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Statistics Agregator Causing ALSB Cluster Performance Degradation (Doc ID 973054.1)

Last updated on DECEMBER 15, 2023

Applies to:

Oracle Service Bus - Version 2.5 and later
Information in this document applies to any platform.


A performance degradation is seen if monitoring is enabled for a large number of services in Aqualogic Service Bus.

Around 20 -30% of the execution threads are awaiting on following call:

[STANDBY] ExecuteThread: '42' for queue: 'weblogic.kernel.Default (self-tuning)'" daemon prio=10 tid=0x0091f8f8 nid=0x148 waiting on condition [0x5617e000..0x5617faa8]
at sun.misc.Unsafe.park(Native Method)
at java.util.concurrent.locks.LockSupport.park(
at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(
at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireShared(
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireShared(
at java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.lock(
at com.bea.wli.monitoring.statistics.collection.StatisticsCollector.getStatistic(
at com.bea.wli.monitoring.statistics.collection.StatisticsCollector.incrementCount(
at weblogic.servlet.FutureResponseServlet.service(
at javax.servlet.http.HttpServlet.service(

Over a period of time this causes a degradation in server performance as well as slow response times. Response time for the ALSB services come beck to normal after bouncing the managed server.


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