ConcurrentModificationException from SinglePoolMatchAllConnectionInterceptor

Zhi Xie

2015-11-03 08:21:51 UTC

Do you do any customize action
in SinglePoolMatchAllConnectionInterceptor.internalGetConnection?
It looks like connection pool size has been updated. Suggest to double
check your multi thread implementation. For example, debug to track the
change of pool size.

Post by sjunejo
Hi,
I am using Jencks 2.2 with geronimo-connector 2.1.2 implementation. I am
using this with custom JCA RA implementation and recently when I started
this in a heavily used multi threaded environment I am getting following
exception;
java.util.ConcurrentModificationException
at
java.util.IdentityHashMap$IdentityHashMapIterator.nextIndex(IdentityHashMap.java:732)
at
java.util.IdentityHashMap$KeyIterator.next(IdentityHashMap.java:822)
at
com.jbase.jremote.jca.JRemoteManagedConnectionFactory.matchManagedConnections(Unknown
Source)
at
org.apache.geronimo.connector.outbound.SinglePoolMatchAllConnectionInterceptor.internalGetConnection(SinglePoolMatchAllConnectionInterceptor.java:61)
at
org.apache.geronimo.connector.outbound.AbstractSinglePoolConnectionInterceptor.getConnection(AbstractSinglePoolConnectionInterceptor.java:80)
at
org.apache.geronimo.connector.outbound.TransactionEnlistingInterceptor.getConnection(TransactionEnlistingInterceptor.java:46)
at
org.apache.geronimo.connector.outbound.TransactionCachingInterceptor.getConnection(TransactionCachingInterceptor.java:96)
at
org.apache.geronimo.connector.outbound.ConnectionHandleInterceptor.getConnection(ConnectionHandleInterceptor.java:43)
at
org.apache.geronimo.connector.outbound.TCCLInterceptor.getConnection(TCCLInterceptor.java:39)
at
org.apache.geronimo.connector.outbound.AbstractConnectionManager.allocateConnection(AbstractConnectionManager.java:87)
at
com.jbase.jremote.jca.JRemoteConnectionFactoryImpl.getConnection(Unknown
Source)
at
com.jbase.jremote.jca.JRemoteConnectionFactoryImpl.getConnection(Unknown
Source)
I looked at the source but as far as I can see we are using IdentityHashMap
but we do synchronize(pool) just before calling the matchManagedConnections
method on my connection factory.
Does anyone in the mailing encounter this....how can I solve this?
Regards
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Best Regards
Gary