https://bz.apache.org/bugzilla/show_bug.cgi?id=57943
Bug ID: 57943
Summary: NioEndpoint, one poller thread died
Product: Tomcat 7
Version: 7.0.54
Hardware: PC
OS: Linux
Status: NEW
Severity: critical
Priority: P2
Component: Connectors
Assignee: [email protected]
Reporter: [email protected]
when i restart tomcat,the tomcat can not process request soon，i find an error
log
Exception in thread "http-nio-7001-ClientPoller-1"
java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
at java.util.HashMap$KeyIterator.next(HashMap.java:828)
at
java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1010)
at
org.apache.tomcat.util.net.NioEndpoint$Poller.timeout(NioEndpoint.java:1421)
at
org.apache.tomcat.util.net.NioEndpoint$Poller.run(NioEndpoint.java:1215)
at java.lang.Thread.run(Thread.java:662)
tomcat poller thread is not catch this exception,so this thread is died.
connection is accept but has no poller thread to process.
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