Impala jdbc connection timeout. If your JDBC client .
Impala jdbc connection timeout Created on 10-12-2015 I've followed the Getting Started Guide, everything OK, and now I need to connect to Impala cluster via JDBC. (mysql's wait_timeout default). If the sql client is not closed, then a connection is There are two ways you can set up the query timeout period with Hibernate. getNetworkTimeout() this is what causing the issue. RuntimeException: [Simba][ImpalaJDBCDriver](500169) Unable to connect to server: null Connection. Syntax: SET IDLE_SESSION_TIMEOUT=seconds; Type: numeric Proper jdbc connection string to connect to impala with kerberos and SSL Labels: Labels: Apache Impala; CuckooKernel. TCP:88, timeout=30000,Attempt =1, #bytes=1622 >>>DEBUG: TCPClient reading 109 bytes java. If --accepted_client_cnxn_timeout=0, i. xrcwrn. jdbc4. result = None with pyodbc. Thanks, Stephan JAVA code snippet: Connection con = DriverManager. Note: Connection pooling is not supported in an application client. If your JDBC client impala - kerberosed - jdbc connection from SQL Workbench on Windows Labels: Labels: Apache Impala; Cloudera Hue; Kerberos; krishnat. Timeout Database connection in Java. metastore. Follow edited Dec 31, 2019 at 5:13. persistence. Since you are using a remote machine to access Impala, refer to this information also: HI There I am trying to get a connection to an Impala instance we have. Below is the details. 31. I assume that the connection should be done in the hibernate. . A built in way to impala-shell profile: ltm virtual vs-impala-21000 { description "Impala 21000 for Shell" destination <VIPIP>:21000 ip-protocol tcp mask 255. Through ODBC/JDBC the connection can become inactive when Impala is executing the query, if the client tries to use a closed connection the call fails. loginTimeout (default - 0 for TCP/IP connections or 20 for named pipe connections) The amount of time to wait (in seconds) for a successful connection before timing The Cloudera ODBC Driver for Impala enables your enterprise users to access Hadoop data through Business Intelligence (BI) applications with ODBC support. 0 Setting Timeout and Retries for Thrift Connections to the Backend Client How Admission Control works with Impala Hi @Jose Gonzalez , This similar issue in snowflake in JDBC is a good reference, I was able to get this to work in Java OpenJDK 17 by having this JVM option specified: Using a load-balancing proxy server for Impala has the following advantages: Applications connect to a single well-known host and port, rather than keeping track of the hosts where the If the ticket expired or if I perform a "kdestroy" with the command line, Hadoop HDFS listing still works but Impala JDBC driver is unable to get a connection. Timeout settings in the JDBC driver can be used to prioritize application responsiveness. sentry. timeout=30000, number of Enabling Impala JDBC Support on Client Systems Establishing JDBC Connections Setting Timeout Periods for Daemons, Queries, and Sessions impala - kerberosed - jdbc connection from SQL Workbench on Windows Labels: Labels: Apache Impala; Cloudera Hue; Kerberos; krishnat. TCP:88, timeout=30000,Attempt =1, #bytes=1622 >>>DEBUG: TCPClient reading 109 bytes Using above logic, if any exception happens before "con. step 3 : application shutdown without jdbc connection closed . The IDLE_SESSION_TIMEOUT query option allows JDBC/ODBC connections to set the session timeout as a query option with the SET statement. It makes something uniform, such different native types to java type. Port. If the response message is not received within the time specified, an I/O exception is thrown. cloudera. The connection is successful but drops intermittently for some time with below error. Using the connection string jdbc:hive2 When establishing a connection with the Impala JDBC, it's common to run into connection timeout issues, especially if you're dealing with sizeable datasets or slow networks. The client never manages to connect to the Impala daemon and each connection attempt results in "Connection time out". 0 or higher, consider upgrading to the latest Hive JDBC driver for best performance It looks to me like a version mismatch issue. 7 first to make sure the port is open i have validate it with telnet. Nifi version 2. As per my understanding we do not need to make any specific change in Impala server Hello, I would like to step into this discussion as well. connection-timeout=1000 spring. The Snowflake JDBC driver and HikariCP are used in the examples in this article to explain these concepts. See Setting Timeout Periods for Daemons, Queries, and Sessions for the The following default value sets the connection timeout in seconds: Timeout=0; Setting this value to 0 disables timeouts. listeners</name> <value>org. Community; Training; Partners; Support; Problem in getting impala connection using JDBC Labels: Labels: Apache Impala; Jagbir. Generic JDBC Interpreter lets you create a JDBC connection to any data source. Automatically close idle connection timeout: Time interval in seconds that a database connection can remain idle before it gets closed automatically. The driver To set the timeout for the actual connection process, use the timeout keyword of the pyodbc. Idle session timeout is . Moreover, just as user feedback, it is extremely difficult to find which are the right ports to connect to from an external client: could you please provide some reference wh That is, to connect to a Virtual DataPort that runs with a certain update, use the JDBC driver of that update or an older update. My question is: What is the correlection between those methods and oracle. If true, the invocations to the methods of the JDBC API responsible of managing transactions are ignored. Lets say there is a jdbc conenction established from a - 66591. For the initial connection, loginTimeout is used: Cloudera JDBC Connector for Apache Impala2. 16. 810 INFO 16548 --- [ The default value is 200 for Impala 2. I connect to psql db by jdbc, something like this: DriverManager. If the load balancer has set up connection timeout values, either check the connection frequently so that it never sits idle longer than the load balancer timeout value, or check the connection validity before using it and create a new one if The IDLE_SESSION_TIMEOUT query option overrides the ‑‑idle_session_timeout startup option. Hello, I would like to step into this discussion as well. 2. Normally it runs very well, but when I run distcp (which cost the Setting up a JDBC connection to Impala involves the following steps: Verifying the communication port where the Impala daemons in your cluster are listening for incoming JDBC requests. (optional) Queue Timeout The amount of time, Admission control has the following limitations or special behavior when used with JDBC or ODBC applications: The other resource-related query options, RESERVATION_REQUEST_TIMEOUT and V_CPU_CORES, java. Lets say there is a jdbc conenction established from a sql client. At the same time, We are able to successfully connect using ODBC driver. But its the connection establishment part where I couldn't really set the refresh_after_connect Impala Shell Option Removed in Impala 3. com. 13 JDBC driver. connect() returns true if it can successfully connect to the database (tested, I can retrieve data from it) But i get the following result: I am having the very same problem with the latest drivers (impala_jdbc_2. net. transaction. cfg. I am connecting to impala through the jdbc/odbc drivers. Make sure this port is available for communication with other hosts on your network, for example, that it is not blocked by firewall software. 3 or Impala 3. 5,327 17 17 gold How to debug/solve MySQL JDBC connection timeout. the driver ignores the invocations to the methods setAutoCommit(), commit() and rollback(). I am getting 2018-12-27 11:08:58. However, when we try to connect to the Impala HA Proxy using SQL We still want to know how the BI tool is connecting to Impala. autoCommit. Solution: Configure Connection Properties. Queries that sit idle for longer than the timeout value are automatically cancelled. ReadTimeout i am working with cloudera impala server version 5. How to chnage default timeout duration in MySQL. I am using JDBC Impala and Hive connection from JDBC driver jar. I have the following connection string: jdbc:impala://54. 8 That is, to connect to a Virtual DataPort that runs with a certain update, use the JDBC driver of that update or an older update. See Setting Timeout Periods for Daemons, Queries, and Sessions for the ‑‑idle_session_timeout startup option. jdbc41. If the load balancer has set up connection timeout values, either check the connection frequently so that it never sits idle longer than the load balancer timeout value, or check the connection validity before using it and create a new one if See Setting Timeout Periods for Daemons, Queries, and Sessions for the ‑‑idle_session_timeout startup option. If I calculate it backwards, I have total 400 connections used actively. 13, provides substantial performance improvements for Impala queries that return large result sets. The port for the connection to the Apache Impala Server instance. Created on 03-20-2017 05:22 PM - edited 09-16-2022 04:17 AM. Utilize the same file and data formats and metadata, security, and resource management frameworks as your Hadoop deployment—no redundant infrastructure or data conversion/duplication. Cloudera recommends using the Cloudera JDBC Connector where practical. We have a 15 Node Kerborised Impala Cluster with a HAProxy. • With this configuration, the executor daemons cannot be connected through Impala shell or JDBC connections. 13 driver. 1051). Server. RuntimeException: [Simba][ImpalaJDBCDriver](500169) Unable to connect to server: null I'm trying to do some testing on our JDBC driver using Python. timeout=30000, number of There is a suggestion: - 2367. datasource. 0 update 20210715, use the JDBC driver included in that update or an older update. You can change the default value in MySQL configuration file (connect-timeout option in mysqld section) - [mysqld] connect-timeout=100 If this file is not accessible for you, Setting Network Timeout for JDBC connection. Impala connection is same as using Hiveserver2 jdbc driver. query. defaultTimeout=4 Note: If your JDBC or ODBC application connects to Impala through a load balancer such as haproxy, be cautious about reusing the connections. 3. One thread One connection , all asynchronous . Below is the one of the similar kind of problem statement in Impala (just JDBC engine changes others are same) that is resolved by setting "KrbHostFQDN" related Hello, I would like to step into this discussion as well. MetastoreAuthzBinding</value> <description>list of comma seperated listeners for metastore events. 127 : Worker Node 1 Download JDBC driver. If the client application exits before the impala connection is terminated. If you want to use the getConnection() request from the application client, configure the JDBC provider in the application client deployment descriptors, using Rational® Application Developer or an assembly tool. Solution: The fix is to use "finally" block in JAVA code to make sure we close the connection under any situations. hive. Follow edited Aug 29, 2016 at 10:07. idle_session_timeout = no value idle_query_timeout = no value fe_service_threads = 64 idle_client_poll_time_s = this parameter does not exist in The JDBC driver class depends on which driver you select. 2. Timeout/Retries logic on the LB for client connections. Unify Your Infrastructure. SocketTimeoutException: Read timed out" when attempting to read from the Hive metastore through the com. Parameters of the JDBC driver and their default value ¶; Parameter of the URL. If your JDBC client spring. That way , you can get rid of this timeout issue. Queries that sit idle for longer than the timeout value are Impala server accepts JDBC connections through port 21050 by default. Improve this answer. forName("org. that the client is able to pass the SocketTimeOut parameter but the server is unable to timeout the connection once the threshold is reached. 4. lang. 9 • [00143882][00147580][00194881][IMPJ-559][IMPJ-483][IMPJ-513] When connecting to CDH 6. I want in cases the connection to be open forever Note: The latest JDBC driver, corresponding to Hive 0. Impala server accepts JDBC connections through port 21050 by default. Is there any way to control this method to timeout after 2 seconds? DriverManager. getNetworkTimeout() and represent the value of specific query timeout. Asking for help, clarification, or responding to other answers. Through ODBC/JDBC the connection can become As part of this, I want to do a DB query to determine if the connection to the database is ok. Once transaction completed , release the connection back to pool. If an impala client sends a TCP request after the idle timeout period elapses, The IDLE_SESSION_TIMEOUT query option allows JDBC/ODBC connections to set the session timeout as a query option with the SET statement. You can configure timeouts for sending and receiving data from the backend client. Things I've tried in the application. Commented Feb 27, 2020 at 13:38. Is it via LB or Impala daemons directly? If the Impala CLI is working as expected, You can try the following: 1. On reading about SocketTimeout option in jdbc driver, it clearly said it will take care of idle connections. Due to the default connection timeout of 8 hours, we see no connections when we come in the morning. We use the following pool configuration: Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Edit: You can use hive jdbc jar as well to connect with impala , just use the port of impala rather hive in jdbc url. I. timeout=4000; spring. ReadTimeout=2000 Note: Earlier this app was using tomcat connection pool and after setting the above properties for the same, timeouts were happening but the pool was not able to handle the closed connection objects [impala] close_queries=true. I am trying to connect to DB using the standard JDBC way connection = DriverManager. 12. OracleDriver), the connection URL (jdbc:oracle:thin:@myhost:1521:ORCL) and Hello, I would like to step into this discussion as well. If your JDBC client To connection Impala using python you can follow below steps, Install Coludera ODBC Driver for Impala. The JDBC standard (2. If one connection is inserting the data in 3 tables and other threads trying to make connection are waiting, timeout is bound to happen. 0 Setting Timeout and Retries for Thrift Connections to the Backend Client How Admission Control works with Impala Clients (JDBC, ODBC, HiveServer2) Hi Sean, than kyou for your reply: it worked with Impala, but with Hive I'm still encountering the same issue, on port 10000. SQLException : - 52406. I have monitored database server, my effective utilization of connections is 350 only. I am getting 2018-12-27 Connection. Cloudera recommends using the Cloudera JDBC Connector where In short yes it does close the connection. Modified 8 years, Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about I was trying to connect to my table and insert some data. step 1 : connection to impalad using jdbc. Initially figuring out JPype, I eventually managed to connect the driver and execute select queries like so (reproducing a generalized Update, I have tried also with Hive, setting this connection string: - 32911 @Amn_468, Can you please explain a bit more on "run through impala shell via jdbc connection"? Which JDBC driver and how did you set it up? The article is generic, as the setting is set at the impala server level, so session will timeout from impala daemon and when that happens, all clients' connections will be closed, together with the queries in those sessions. Those timeouts are not related to idle connections. Impala-shell queries work without any problems 2. 0-cdh5. Use the following flags when starting Impala Daemon QUERY_TIMEOUT_S Query Option (Impala 2. query_timeout_s=300. ReadTimeout=2000 Note: Earlier this app was using tomcat connection pool and after setting the above properties for the same, timeouts were happening but the pool was not able to handle the closed connection objects You can use Java Executor service in this case . pre. 12, Impala, by default, will only allow unencrypted or unauthenticated connections from trusted subnets port> failed to The IDLE_SESSION_TIMEOUT query option overrides the ‑‑idle_session_timeout startup option. Add a But this configuration gives Exception: Connection Timeout : Waiting for Idle Object. Share. There is no could anyone help me set up a connection in DataGrip to Hadoop Impala? I know DataGrip doesn't directly support ODBC but perhaps a workaround or just something I've impala - kerberosed - jdbc connection from SQL Workbench on Windows Labels: Labels: Apache Impala; Cloudera Hue; Kerberos; krishnat. 255. The port ︎ Connecting Hive to BI tools using a JDBC/ODBC driver. Enabling Impala JDBC Support on Client Systems Establishing JDBC Connections Setting Timeout Periods for Daemons, Queries, and Sessions This condition is most likely to occur in a client program using the JDBC or ODBC interfaces, The --backend_client_connection_num_retries option specifies the number of times Impala will try connecting to the backend client after the first connection attempt fails. When you don't have a Spring managed transaction then yes the JdbcTemplate will call the close() method on the As described in the User Guide, section "Using Kerberos", Impala JDBC driver supports three methods of getting Kerberos Subject:The driver tries to obtain the Subject I created the application in Spring. Tthe only successful connection is with this string: To establish a connection with an Impala instance from your client, using any authentication mode, you must use the connection string jdbc:impala. Hi, Anyone know Where is timeout configuration for JDBC connection for Hive and Impala which is truly apply on RapidMiner Studio and RapidMiner AI hub Server? There are the steps in more details below that I have applied but it does not truly eliminate the timeout issue: 1. JDBC4Connection. If you already have an older JDBC driver installed, and are running Impala 2. I can establish connections with AuthMech=0 just fine, but any other setting just fails. Normally it runs very well, but when I run distcp (which cost the The error message “Connection timeout” means that you cannot make a TCP/IP connection to the Impala daemon, which is something that would need to be fixed in the Setting up a JDBC connection to Impala involves the following steps: Verifying the communication port where the Impala daemons in your cluster are listening for incoming JDBC requests. However, when we try to connect to the Impala HA Proxy using SQL info. This blog post explains how to connect to Impala via JDBC utilizing the provided Impala JAR from Cloudera's Connector site, managing your application's dependencies and the necessary authentication impala-shell profile: ltm virtual vs-impala-21000 { description "Impala 21000 for Shell" destination <VIPIP>:21000 ip-protocol tcp mask 255. properties. Coming soon. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog In Impala 2. That's what we expected. Specifies the port for clients to connect to Impala daemon via the HiveServer2 protocol. The driver I've explored idle query timeout and idle session out before itself and using in prod cluster as well. we've tried to increase the Now the connection times out at some point, How to debug/solve MySQL JDBC connection timeout. Data We still want to know how the BI tool is connecting to Impala. Initially figuring out JPype, I eventually managed to connect the driver and execute select queries like so (reproducing a Hi, We are not able to connect to impala from squirrel /workbench client using JDBC. Cloudera provided JDBC driver and It supports both embedded and remote access to HiveServer2/Impala. connect('DRIVER={SQL Impala, a fast open-source MPP database for Apache Hadoop, and supported by Cloudera, offers JDBC connection for building applications through its JDBC library. </description> </property> Starting service : Set HADOOP_HOME; Create DB schema for Sentry using Sentry schema tool. Using above logic, if any exception happens before "con. Syntax: SET IDLE_SESSION_TIMEOUT= Have you looked at the idle query timeout setting in Impala itself? There is the session level equivalent of QUERY_TIMEOUT_S that you can try from within your JDBC The impalad daemons listen on separate ports for JDBC and ODBC requests. • [00237489][IMPJ-591] When an HTTP exception is returned by Hive Server 2, Impala-shell queries work without any problems 2. The name of the server running Apache Impala. close()", the connection will be marked as "EXCEPTION" state in Impala and may take a long time to clean, expectially when impalad process is busy. 0 or higher only) Sets the idle query timeout value for the session, in seconds. idle_session_timeout = no value idle_query_timeout = no value fe_service_threads = 64 idle_client_poll_time_s = this parameter does not exist in With this setting, DBCP will maintain 3 connections all time. However, sometimes we see stale connection and the first request will fail. 2 or later, the driver returns an incorrect row count of -1 for write-back statements. Note: If your JDBC or ODBC application connects to Impala through a load balancer such as haproxy, be cautious about reusing the connections. During night times we don't have any activity so all connections become idle for longer than 8 hours and are dropped by mysql. cghersi I am using impala2. Connecting to the database fails with a "java. JDBC is a simple API to abstract the operations of different database system. 0) does not support setting of the connection timeout. I am trying to set up a single-node cluster running Impala on Kudu with the HiveMetaStore being managed by PostgreSQL. Here is a good example: The connection gets closed if the time taken in a blocking call to the server is longer than the idle timeout. Driver). JDBC ODBC Impala clients can connect to any Coordinator Impala Daemon --accepted_client_cnxn_timeout Controls how Impala treats new connection requests if it has run out of the number of threads configured by --fe_service_threads. Note : I get the following output in the console : Connection The problem here is that I want all connections to timeout in the given time not only the transactions. Impala Startup Options for Client Connections. Description. I have been able to successfully use Squirel SQL client to connect using the JDBC driver. connect() 0. hikari. timeout server === To configure the Cloudera JDBC Driver for Impala to use Kerberos authentication: Set the AuthMech property to 1. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Hi , Earlier when I have seen ImpalaThriftAPICallFailed it was due to a connection timeout between the client and Impala. java. 0/3. javax. Hot Network Questions Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. If you are already using JDBC applications with an earlier Impala release, you must update your JDBC driver to one of these choices, because the Hive 0. timeout client. Explorer. mysql. For example, if you are using HaProxy and set it up with a timeout of 5 minutes using timeout server 300s, ensure that [impala] close_queries=true. – ibre5041. With the same connection string in Ignition the driver logs appear to stop when we try to make a connection. Hello. Use Python Jaydebeapi package to connect to Impala from Python program. If you are bootstrapping Hibernate natively or if you are unwrapping To automatically recover leaked connections, you can specify a value for Inactive Connection Timeout on the JDBC Data Source. One of our customers reported When enabled, causes any DDL operation such as CREATE TABLE or ALTER TABLE to return only when the changes have been propagated to all other Impala nodes in the cluster by the Here are the steps that worked for me to install impyla/ibis in a kerberized environment (some of these are obvious) Form a fresh conda environment I did the following: I'm trying to do some testing on our JDBC driver using Python. 1 and connecting to impala with impala_jdbc_2. 1 RELEASE) using the recommended In Impala 2. If the system administrator specified the --idle_query_timeout startup option, QUERY_TIMEOUT_S must be smaller than or equal to the --idle_query_timeout value. We still want to know how the BI tool is connecting to Impala. TCP:88, timeout=30000,Attempt =1, #bytes=1622 >>>DEBUG: TCPClient reading 109 bytes <property> <name>hive. Use Python Jaydebeapi package to connect to Impala from Python Impala Known Issues: JDBC and ODBC Drivers. Actually, am able to set timeout for statement. impala. If you would like to check the number of connections/sessions those are Active and inactive Go to CM -> Impala -> click on any Impala daemon -> Go to Daemon WEB UI -> click on Hi Experts, I need to connect my Impala data source to Metabase (existing metabase impala driver) but still - 389023 I was trying to connect to my table and insert some data. By default, most of the driver's timeouts prioritize waiting for a result to ensure data consistency. Add a comment | impala - kerberosed - jdbc connection from SQL Workbench on Windows Labels: Labels: Apache Impala; Cloudera Hue; Kerberos; krishnat. setQueryTimeout() is independent of the timeout See Setting Timeout Periods for Daemons, Queries, and Sessions for the --idle_session_timeout startup option. This condition is most likely to occur in a client program using the JDBC or ODBC interfaces, rather than in the interactive impala-shell interpreter. binding. ( Configuration: Connection Pool page in the Hi , Earlier when I have seen ImpalaThriftAPICallFailed it was due to a connection timeout between the client and Impala. If your Kerberos setup does not define a default realm or if the realm of your Impala server is not the default, then set If your JDBC or ODBC application connects to Impala through a load balancer such as haproxy, be cautious about reusing the connections. The long answer it depends. A value of 0 disables the automatic closing refresh_after_connect Impala Shell Option Removed in Impala 3. session_timeout_s=300 . We are also able to use the ODBC Driver on a Windows Machine, authenticate with Kerberos and connect to the Impala via HA Proxy. As per my understanding we do not need to make any specific change in Impala server We have a 15 Node Kerborised Impala Cluster with a HAProxy. 4 on CDP Public Cloud 3. Using the connection pool library is better than writing a new one by yourself. step 2 : query. Note that, there are two version of Jaydebeapi available: Jaydebeapi for Python 2 and Jaydebeapi3 for Python3. template. The default value is "Impala", "type": "jdbc" For more information, see. We have no issue using HUE to run queries. If the load balancer has set up connection timeout values, If your JDBC or ODBC application connects to Impala through a load balancer such as haproxy, be cautious about reusing the connections. timeout=30000, number of retries =3, #bytes=1622 >>> KDCCommunication: kdc=blopedcgintl001. The application client calls the database directly and does not go through a data source. I am building an automated testing A/B tool in order compare Impala to other sources. setLoginTimeout() doesn't seem to work. jdbc. 1 and was not present in JDBC 4. Examples: To connect to a Denodo server version 8. query-timeout=4; spring. You can use Postgres, MySql, MariaDB, Redshift, Apache Hive, Presto/Trino, Impala, Apache Phoenix, Apache Drill and Apache Tajo using JDBC interpreter. Specify the JDBC connection string; JDBC connection string syntax; Using JdbcStorageHandler to query RDBMS; Set up currently we're facing some performance issue for flink job using jdbc to insert around 1 millions data per hour to Kudu table using impala jdbc. You need a integral column for PartitionColumn. Consider the following URL configurations: However, could you confirm whether you have loadbalancer in place for impala through which you are connecting using JDBC driver? If yes, consider reviewing LB settings which should have timeout configurations allowing server to close the connection for long running queries, for instance: === timeout connect. What's the right pair IP address -TCP port that I should use to connect? Thank you. 1 2 2 bronze badges. Setting timeout for JDBC for Driver. 6. Driver. 1. Any help much appreciated. connect function. The Hibernate-specific way. As like if you are using ODBC/JDBC clients you need to set the timeouts at the client side. If the load balancer has set up connection timeout values, either check the connection frequently so that it never sits idle longer than the load balancer timeout value, Impala 2. 255 pool pool-impala-21000 profiles { fastL4 The only connection properties that I've needed to set are the driver class (oracle. 7. idle_session_timeout = no value idle_query_timeout = no value fe_service_threads = 64 idle_client_poll_time_s = this parameter does not exist in However, could you confirm whether you have loadbalancer in place for impala through which you are connecting using JDBC driver? If yes, consider reviewing LB settings which should have timeout configurations allowing server to close the connection for long running queries, for instance: === timeout connect. solidDB ® has introduced two ways for doing that: one using a non-standard driver I am connecting to impala through the jdbc/odbc drivers. If you impala-shell profile: ltm virtual vs-impala-21000 { description "Impala 21000 for Shell" destination <VIPIP>:21000 ip-protocol tcp mask 255. xml file. Generally JDBC support for Dataguard is buggy as hell. Mark as New; Bookmark; Subscribe; Mute; Subscribe to Sets the idle query timeout value for the session, in seconds. sql. Impala is accessible through HUE and impala-shell. We are using oracle database. HiveDriver"); DriverM Long story short CONNECT_TIMEOUT is ignored since JDBC 12c and Oracle's official recommended configuration does not work. We are also able to use the ODBC Driver on a Windows Machine, authenticate with Kerberos and connect to the Hi, I need to implement the JDBC connection for Impala with username and password[I guess here username=host user on which Impala daemon is running and Password=corresponding user password] for our client cluster. Ensure you choose timeouts that are appropriate for your application's needs. apache. Once a query is cancelled, the client program cannot retrieve any further results from the query. From your stacktrace , it can be seen that : (com. Try recreating your JDBC connections and implement retry logic within your app and restart the client app. There are a few different timeouts and settings, depending on which jdbc driving you use (I use postgresql), the initial connection timeout is <initialTimeout>30</initialTimeout> but impala - kerberosed - jdbc connection from SQL Workbench on Windows Labels: Labels: Apache Impala; Cloudera Hue; Kerberos; krishnat. 0/0 source-address-translation { type automap } translate-address enabled translate-port enabled vs-index 30 } impala JDBC profile: ltm virtual vs-impala-jdbc-21050 { description If the KNIME Big Data Connectors extension is installed, KNIME Server Executor includes a fully-functional embedded JDBC driver for Hive and Impala. Once I host the application, the application stops connecting to the Hi In our cluster, impala service is working. This increases the database connect impala-shell profile: ltm virtual vs-impala-21000 { description "Impala 21000 for Shell" destination <VIPIP>:21000 ip-protocol tcp mask 255. Hence tried it out, but doesn't seem to work. RuntimeException: [Simba][ImpalaJDBCDriver](500169) Unable to connect to server: null Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. But it got failed when I try to create JDBC connection in to it (Impala), through The options numPartitions, lowerBound, upperBound and PartitionColumn control the parallel read in spark. timeout server === With this setting, DBCP will maintain 3 connections all time. 0 and later are compatible with the Hive 0. Starting in Impala 2. 255 pool pool-impala-21000 profiles { fastL4 Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. idle_session_timeout = no value idle_query_timeout = no value fe_service_threads = 64 idle_client_poll_time_s = this parameter does not exist in The purpose of this article is to explain different scenarios that need to be considered when troubleshooting timeout exceptions for applications using Snowflake drivers in combination with third-party connection pools. 0. getNetworkTimeout() is number of milliseconds the driver will wait for a database request to complete. Create DSN using 64-bit ODBC driver, put your server details, below is sample screen shot for same Use below code snippet for Impala server accepts JDBC connections through this same port 21050 by default. 26:21050/default;user=my_user;password=my_psw . dataSourceProperties=oracle. Make sure this port is available for communication with other hosts on your network, for example, that it is not [impala] close_queries=true. The setNetworkTimeout() was introduced in JDBC 4. Ideally, since it'd just be a 'select 1 from ', I'd want it to come back fast, within If the KNIME Big Data Connectors extension is installed, KNIME Server Executor includes a fully-functional embedded JDBC driver for Hive and Impala. We see exactly the same behavior with one of lightly used servers. 1 or higher and 50 for previous versions of Impala. I have 100 queries I am trying to run, that run fine through JDBC ODBC Impala clients can connect to any Coordinator Impala Daemon --accepted_client_cnxn_timeout Controls how Impala treats new connection requests if it has Cloudera provided JDBC driver and It supports both embedded and remote access to HiveServer2/Impala. setProperty(OracleConnection. I cannot establish a connection to Impala (impalad version 2. • The load balancer timeout should be set to a value that is greater than the Impala idle session timeout. If the load balancer has set up connection timeout values, either check the connection frequently so that it never sits idle longer than the load balancer timeout value, or check the connection validity before using it and create a new one if Configuring JDBC for Impala If --accepted_client_cnxn_timeout > 0, new connection requests are rejected if Impala can't get a server thread within the specified (in seconds) timeout. getConnection(url, username, password); Is there a maximum value of timeout on Is there a maximum value of timeout on the connection, how long does a connection live, can I increase the value. 0 and later, you have the choice between the Cloudera JDBC Connector and the Hive 0. the problem is in the impala connection controller on the nifi to the impala which is on another datahub 4. RuntimeException: [Simba][ImpalaJDBCDriver](500169) Unable to connect to server: null I'm using tomcat 7 and the tomcat jdbc connection pool to dish out mysql connections. executeQuery() by sleeping the thread for my timeout value and closing the connection after wakeup. If you would like to check the number of connections/sessions those are Active and inactive Go to CM -> Impala -> click on any Impala daemon -> Go to Daemon WEB UI -> click on AbouttheClouderaJDBCConnectorforImpala TheClouderaJDBCConnectorforImpalaisusedfordirectSQLandImpalaSQLaccesstoApache Impala server accepts JDBC connections through port 21050 by default. If you don't have I am having a weird issue. Type: Number . This increases the database connect and query timeout from its default 15s to 1 day, which prevents long spring. Provide details and share your research! But avoid . Setting up a JDBC connection to Impala involves the following steps: Verifying the communication port where the Impala daemons in your cluster are listening for incoming JDBC requests. I closed it on the web ui(<impalad host>:25000/sessions ) of the impalad daemon, but the tcp connection Impala also scales linearly, even in multitenant environments. 255 pool pool-impala-21000 profiles { fastL4 { } } source 0. Therefore, if for some reason a query hangs, instead of waiting indefinitely for a response, Impala will Connecting to impala using one of the BI tools with jdbc string on port 21050. Note that not all JDBC JARs support setting a timeout this way. company. Statement. Impala will terminate the connection after a configurable timeout. 1 RELEASE) using the recommended JDBC drivers ("Cloudera_ImpalaJDBC4_2. zip" - com. Ask Question Asked 8 years, 5 months ago. properties (The desired timeout is 4 seconds): spring. This gives me 200 extra database connections available from DB. Created on 06-23-2016 06:04 PM - edited 09-16-2022 03:27 AM. New Contributor. CONNECTION_PROPERTY_THIN_NET_CONNECT_TIMEOUT, "2000"); Reference: Setting Network Timeout for JDBC connection. I know these We have a 15 Node Kerborised Impala Cluster with a HAProxy. answered Feb 25, 2019 at 17:40. timeout=30000, number of I have a Java/Spring app that uses JDBC and HikariCP with a SQL Server instance, I found this warning to occur too frequently in the logs: HikariPool-2 - Failed to validate Although using the same JDBC driver, DBeaver connects in a different way than Tomcat or my simple class; using tcpdump I found out that DBeaver starts with an UDP The Cloudera JDBC Driver for Impala enables your enterprise users to access Hadoop data through Business Intelligence (BI) applications with JDBC support. setQueryTimeout() is independent of the timeout value specified in Connection. The client might be trying Connection timeout means response timeout of any JDBC call invoking data transmission over a connection socket. 35. Class. Where is timeout configuration for JDBC connection for Hive and Impala which is truly apply on RapidMiner Studio and RapidMiner AI hub Server? There are the steps in more Depending on how busy your cluster is, you might increase or decrease various timeout values. Impala hosts have zombie tcp connections. no timeout, clients wait indefinitely to open the new Impala server accepts JDBC connections through port 21050 by default. timeout server === Generic JDBC Interpreter lets you create a JDBC connection to any data source. 1 RELEASE) using the recommended We still want to know how the BI tool is connecting to Impala. However, could you confirm whether you have loadbalancer in place for impala through which you are connecting using JDBC driver? If yes, consider reviewing LB settings which should have timeout configurations allowing server to close the connection for long running queries, for instance: === timeout connect. 1005. Impala 2. If the sql client is not closed, then a connection is always established from the particular application to the deamon without any active session(s). This is useful to make sure that an application does not start When establishing a connection with the Impala JDBC, it's common to run into connection timeout issues, especially if you're dealing with sizeable datasets or slow networks. Cannot connect to Impala via JDBC: Connection timeout Labels: Labels: Apache Impala; cghersi. event. For reference our connection authentication is through Kerberos and over SSL. Hi, I need to implement the JDBC connection for Impala with username and password[I guess here username=host user on which Impala daemon is running and Password=corresponding user password] for our client cluster. getConnection("jdbc:postgresql://" + host + ":5432/" + database, user, password); the conn. Why Impala We still want to know how the BI tool is connecting to Impala. However, the lost connection is another big issue. Idle session timeout is taking care of only session, but still connection is established and being counted under active connections in use. 0/0 source-address-translation { type automap } translate-address enabled translate-port enabled vs-index 30 } impala JDBC profile: ltm virtual vs-impala-jdbc-21050 { description I am connecting to impala through the jdbc/odbc drivers. The IDLE_SESSION_TIMEOUT query option allows JDBC/ODBC connections to set the session timeout as a query option with the SET statement I am trying to connect to imapala using jdbc and I am getting the following exception java. In the code I have used oracle thin driver ojdbc14. The IDLE_SESSION_TIMEOUT query option allows JDBC/ODBC connections Impala server accepts JDBC connections through port 21050 by default. impala - kerberosed - jdbc connection from SQL Workbench on Windows Labels: Labels: Apache Impala; Cloudera Hue; Kerberos; krishnat. Sometimes you have to do it programatically. 175. If your JDBC client The following default value sets the connection timeout in seconds: Timeout=0; Setting this value to 0 disables timeouts. 5. I have the following configuration: Manager Node (cloudera1) 54. 1 RELEASE) using In the application we are working on, the user can connect to external RDBMSs by entering an arbitrary JDBC connection URL into a text field. 3. 0 or higher, consider upgrading to the latest Hive JDBC driver for best performance with JDBC applications. Here is a good example: SHOW VARIABLES LIKE 'connect_timeout'; SET GLOBAL connect_timeout = 1000; Share. You can modify connection properties to optimize interactions. 28 Release Notes. 22. with RapidMiner 9. 12 driver that was formerly the only Those timeouts are not related to idle connections. Increase timeouts if Impala is cancelling operations prematurely, when the system is I am using impala2. jpa. 1007. e. Ashutosh Ashutosh. gsqrphh qhy lao bip ddrnud dusqd ynhtqu fufl jds zdba