[CXF-6825] Performance bottle neck due to synchronize block on each read

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.1, 3.1.1, 3.1.2, 3.1.3, 3.1.4, 3.1.5, 3.1.6, 3.2.0
• Component/s: Bus, JAX-RS

Environment

All environments

• Estimated Complexity: Unknown
• Assignee: Unassigned
• Reporter: Yotam Madem
• Created: 09/Mar/16 07:52
• Updated: 24/Mar/16 00:47

Description

In our (IBM MobileFirst foundation) performance tests it is possible to see that many threads are stuck at:

"LargeThreadPool-thread-1505" daemon prio=10 tid=0x00007f10f020b800 nid=0x31fc waiting for monitor entry [0x00007f12bfffd000]
java.lang.Thread.State: BLOCKED (on object monitor)
at org.apache.cxf.BusFactory.getThreadBusHolder(BusFactory.java:120)

• waiting to lock <0x00000000c6b99020> (a java.util.WeakHashMap)
  at org.apache.cxf.BusFactory.getAndSetThreadDefaultBus(BusFactory.java:202)

(We use version 3.1.0)
I did a test fix locally and it seems to resolve our problem so I submitted 2 pull requests:

for 3.1.6: https://github.com/apache/cxf/pull/119
for 3.2.0: https://github.com/apache/cxf/pull/120