Details
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Bug
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Resolution: Done
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Major
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fuse-7.9-GA
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None
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False
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False
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%
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Not applicable
Description
An application using Camel/CXF, under high load, shows extensive contention for locks on a `URLClassPath` object. For example, I see one thread holding the lock:
"qtp1626832672-12036189" #12036189 prio=5 os_prio=0 tid=0x00007f4904009000 nid=0x14497 waiting for monitor entry [0x00007f431ebeb000] java.lang.Thread.State: BLOCKED (on object monitor) at sun.misc.URLClassPath.getNextLoader(URLClassPath.java:479) - locked <0x00000001c0e300b0> (a sun.misc.URLClassPath) at sun.misc.URLClassPath.getResource(URLClassPath.java:248) .. at org.apache.cxf.jaxrs.provider.AbstractJAXBProvider.objectFactoryOrIndexAvailable(AbstractJAXBProvider.java:574) ... at org.apache.cxf.jaxrs.utils.JAXRSUtils.readFromMessageBody(JAXRSUtils.java:1283) at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121) at org.apache.cxf.transport.servlet.AbstractHTTPServlet.doPost(AbstractHTTPServlet.java:218)
and many, perhaps hundreds, of similar threads all waiting for it:
"qtp1626832672-12036188" #12036188 prio=5 os_prio=0 tid=0x00007f48e0011800 nid=0x14496 waiting for monitor entry [0x00007f4300085000] java.lang.Thread.State: BLOCKED (on object monitor) at sun.misc.URLClassPath.getLookupCache(URLClassPath.java:406) - waiting to lock <0x00000001c0e300b0> (a sun.misc.URLClassPath)
This can potentially lead to a bottleneck in throughput.
