https://bz.apache.org/bugzilla/show_bug.cgi?id=61825
Bug ID: 61825
Summary: Tomcat8.0.30 Async request happend memory leak
Product: Tomcat 8
Version: 8.0.30
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Connectors
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ----
Created attachment 35557
--> https://bz.apache.org/bugzilla/attachment.cgi?id=35557&action=edit
the Http11ConnectionHandler concurrentHashmap contain too may request
I am use tomcat8.0.30,use the async function,programe running a fews day,
found the full gc is runnig all the time,but memory is not clean up,i dump the
memory analyse by eclipse mat found the follow result:
Request,Response,Nio2Channels and so an,the object is top big object.
19,289 instances of "org.apache.tomcat.util.net.Nio2Channel", loaded by
"java.net.URLClassLoader @ 0x730cc4d58" occupy 319,430,000 (11.05%) bytes.
These instances are referenced from one instance of
"java.util.concurrent.ConcurrentHashMap$Segment[]", loaded by "<system class
loader>"
Keywords
one
19,488 instances of "org.apache.catalina.connector.Response", loaded by
"java.net.URLClassLoader @ 0x730cc4d58" occupy 493,942,352 (17.09%) bytes.
These instances are referenced from one instance of "java.lang.Object[]",
loaded by "<system class loader>"
two:
19,488 instances of "org.apache.catalina.connector.Request", loaded by
"java.net.URLClassLoader @ 0x730cc4d58" occupy 474,043,792 (16.40%) bytes.
These instances are referenced from one instance of "java.lang.Object[]",
loaded by "<system class loader>"
three:
19,289 instances of "org.apache.tomcat.util.net.Nio2Channel", loaded by
"java.net.URLClassLoader @ 0x730cc4d58" occupy 319,430,000 (11.05%) bytes.
These instances are referenced from one instance of
"java.util.concurrent.ConcurrentHashMap$Segment[]", loaded by "<system class
loader>"
all memory size is 2.1G,tomcat async request and response and Nio2Channel
occupy 1.8G memory，maybe the Nio2Channel,has a concurrentHashMap,the map
reflence too may Http11Nio2Processor
My switch the request to other server,the tomcat async request and response is
can't clean by gc,so i guess the tomcat is memory leak may be.
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