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Agents bring down node



Pega Platform nodes with a group of four business logic agents running go down shortly (about a minute) after startup.

The "go down" is observed by a lack of responsiveness to requests and a thread dump in the logs. 

Error Messages

"[ACTIVE] ExecuteThread: '3' for queue: 'weblogic.kernel.Default (self-tuning)'" daemon prio=10 tid=0x00007ffddc004000 nid=0x1567 runnable [0x00007ffdf47e0000]
     java.lang.Thread.State: RUNNABLE
     at Method)
     - locked < 0x000000060818aa68> (a
     at oracle.jdbc.driver.T4CConnection.connect(
     at oracle.jdbc.driver.T4CConnection.logon(
     at oracle.jdbc.driver.PhysicalConnection.connect(
     at oracle.jdbc.driver.T4CDriverExtension.getConnection(
     at oracle.jdbc.driver.OracleDriver.connect(
     at java.sql.DriverManager.getConnection(
     at java.sql.DriverManager.getConnection(
     at ...

Steps to Reproduce

  1. Start business processing agents.
  2. Observe the node becomes unresponsive and a thread dump is present in the Pega logs.

Root Cause

A defect or configuration issue in the operating environment. The agent in question was attempting to access a certain database schema which had connection information that was no longer current following a database move. The schema or database target was identified with the use of the debug logger on the class ConnectionManagerImpl.


Perform the following local-change:

Update the database target connection information to point to the latest configuration.


Published June 6, 2016 - Updated October 8, 2020

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