https://bz.apache.org/bugzilla/show_bug.cgi?id=64628
Bug ID: 64628
Summary: tomcat6/7/8/9 processorCache is no remove from the
processors of RequestGroupInfo in concurrent release
Product: Tomcat 9
Version: 9.0.5
Hardware: All
OS: All
Status: NEW
Severity: critical
Priority: P2
Component: Catalina
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: -----
Created attachment 37374
--> https://bz.apache.org/bugzilla/attachment.cgi?id=37374&action=edit
too many processor in processors of RequestGroupInfo
httpnio processor release exist processor no unregister from jmx bean at
concurrent invoke push method of RecycledProcessors
@SuppressWarnings("sync-override") // Size may exceed cache size a bit
@Override
public boolean push(Processor processor) {
int cacheSize = handler.getProtocol().getProcessorCache();
boolean offer = cacheSize == -1 ? true : size.get() < cacheSize;
//avoid over growing our cache or add after we have stopped
boolean result = false;
if (offer) {
result = super.push(processor);
if (result) {
size.incrementAndGet();
}
}
if (!result) handler.unregister(processor);
return result;
}
cacheSize default is 200,if current size is 199 is lower 200 and two thread
push processor at the same time ,all offer is true,so result also is true.
so processor cache is more than 200 ,so no do unregister with processor,
so the processor don't remove from the processors of RequestGroupInfo
and running time too long,the processor cache is too many,because new create
processor is do register to jmx and add to the processors of RequestGroupInfo
so the sync-override is need add
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