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Support Article

Database connection not available ConnectionWaitTimeoutException

SA-36743

Summary



Thread dumps cause slowness and JVM crash.

Error Messages




2017-04-14 16:08:19,017 [j2ee14_ws,maxpri=10]] [ STANDARD] [ PegaRULES:06.02] ( internal.access.DatabaseImpl) ERROR - There was a problem with the database when getting a list:
com.pega.pegarules.pub.database.ConnectionException: Database-General Problem encountered when getting connection for database pegarules 0 Connection not available, Timed out waiting for 180002
From: (B55EA34AA62120FD75844EC84C204F7BF)
Caused by SQL Problems.
Problem #1, SQLState null, Error code 0: com.ibm.websphere.ce.cm.ConnectionWaitTimeoutException: Connection not available, Timed out waiting for 180002
at com.pega.pegarules.data.internal.access.ExceptionInformation.createExceptionDueToDBFailure(ExceptionInformation.java:163)
at com.pega.pegarules.data.internal.access.ConnectionManagerImpl.getConnection(ConnectionManagerImpl.java:1352)


Steps to Reproduce



Perform a load test with a high volume of requestors.


Root Cause



A defect or configuration issue in the operating environment
A very high volume of requestors causes an insufficient number of connections to be available in the connection pool.

Resolution



Perform the following local-change to increase the number of connections in the WebSphere Application Server:
  1. Set the Maximum Connections value to be higher, based on the environment needs in the WebSphere Application Server Admin Console, Resources > JDBC > Data Source.
  2. Go to IBM Support and search on swg21573982 to find the release note titled Default maximum connections size is too small in IBM Business Process Manager (BPM) 7.5


Published May 5, 2017 - Updated October 8, 2020

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