[POOL-281] Infinite loop

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.2
• Fix Version/s: 2.3

Environment

Linux,JDK1.6.23,Tomcat6

• Assignee: Unassigned
• Reporter: lqm
• Created: 07/Dec/14 15:35
• Updated: 31/Dec/14 16:21
• Resolved: 08/Dec/14 13:14

Description

I use the pool2 as a tcp connection pool,when I start tomcat,one thread occur an infinite loop In the advance() method,but it sometimes happens, not always,the java statck information is as follows:

Thread 2194: (state = IN_JAVA)

• org.apache.commons.pool2.impl.LinkedBlockingDeque$AbstractItr.advance() @bci=42, line=1163 (Compiled frame; information may be imprecise)
• org.apache.commons.pool2.impl.LinkedBlockingDeque$AbstractItr.next() @bci=29, line=1184 (Interpreted frame)
• org.apache.commons.pool2.impl.GenericKeyedObjectPool.clearOldest() @bci=85, line=741 (Interpreted frame)
• org.apache.commons.pool2.impl.GenericKeyedObjectPool.create(java.lang.Object) @bci=56, line=991 (Interpreted frame)
• org.apache.commons.pool2.impl.GenericKeyedObjectPool.borrowObject(java.lang.Object, long) @bci=59, line=356 (Interpreted frame)
• org.apache.commons.pool2.impl.GenericKeyedObjectPool.borrowObject(java.lang.Object) @bci=6, line=277 (Interpreted frame)

Thread 2195: (state = BLOCKED)

• sun.misc.Unsafe.park(boolean, long) @bci=0 (Interpreted frame)
• java.util.concurrent.locks.LockSupport.park(java.lang.Object) @bci=14, line=158 (Interpreted frame)
• java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt() @bci=1, line=811 (Interpreted frame)
• java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(java.util.concurrent.locks.AbstractQueuedSynchronizer$Node, int) @bci=48, line=842 (Interpreted frame)
• java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(long) @bci=112, line=2033 (Interpreted frame)
• org.apache.commons.pool2.impl.LinkedBlockingDeque.pollFirst(long, java.util.concurrent.TimeUnit) @bci=50, line=569 (Interpreted frame)
• org.apache.commons.pool2.impl.GenericKeyedObjectPool.borrowObject(java.lang.Object, long) @bci=105, line=363 (Interpreted frame)
• org.apache.commons.pool2.impl.GenericKeyedObjectPool.borrowObject(java.lang.Object) @bci=6, line=277 (Interpreted frame)