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Posted to dev@tomcat.apache.org by bu...@apache.org on 2011/05/12 09:32:01 UTC
DO NOT REPLY [Bug 51189] New: Acceptor threads are blocked
https://issues.apache.org/bugzilla/show_bug.cgi?id=51189
Bug #: 51189
Summary: Acceptor threads are blocked
Product: Tomcat 7
Version: 7.0.11
Platform: All
OS/Version: Linux
Status: NEW
Severity: blocker
Priority: P2
Component: Connectors
AssignedTo: dev@tomcat.apache.org
ReportedBy: helinxiang@gmail.com
Classification: Unclassified
Hi,
I deployed an web application on tomcat 7.0.11, it got acceptor threads
blocked when it ran two weeks, and the mysql connections weren't released, I
guess they are the same problem. I don't whether it is a bug of JIoEndpoint.
Thanks a lot.
EastMountain
Thread dump below:
""http-bio-8080"-Acceptor-3" daemon prio=10 tid=0x00002aaab4148000 nid=0x141d
waiting for monitor entry [0x00000000419ac000]
java.lang.Thread.State: BLOCKED (on object monitor)
at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:388)
- waiting to lock <0x00002abd72beb518> (a java.net.SocksSocketImpl)
at java.net.ServerSocket.implAccept(ServerSocket.java:453)
at java.net.ServerSocket.accept(ServerSocket.java:421)
at
org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket(DefaultServerSocketFactory.java:59)
at
org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:211)
at java.lang.Thread.run(Thread.java:619)
""http-bio-8080"-Acceptor-2" daemon prio=10 tid=0x00002aaab4898800 nid=0x141c
runnable [0x00000000411af000]
java.lang.Thread.State: RUNNABLE
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:390)
- locked <0x00002abd72beb518> (a java.net.SocksSocketImpl)
at java.net.ServerSocket.implAccept(ServerSocket.java:453)
at java.net.ServerSocket.accept(ServerSocket.java:421)
at
org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket(DefaultServerSocketFactory.java:59)
at
org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:211)
at java.lang.Thread.run(Thread.java:619)
""http-bio-8080"-Acceptor-1" daemon prio=10 tid=0x00002aaab45a4800 nid=0x141b
waiting for monitor entry [0x0000000041930000]
java.lang.Thread.State: BLOCKED (on object monitor)
at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:388)
- waiting to lock <0x00002abd72beb518> (a java.net.SocksSocketImpl)
at java.net.ServerSocket.implAccept(ServerSocket.java:453)
at java.net.ServerSocket.accept(ServerSocket.java:421)
at
org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket(DefaultServerSocketFactory.java:59)
at
org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:211)
at java.lang.Thread.run(Thread.java:619)
""http-bio-8080"-Acceptor-0" daemon prio=10 tid=0x00002aaab48a7800 nid=0x141a
waiting for monitor entry [0x000000004116e000]
java.lang.Thread.State: BLOCKED (on object monitor)
at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:388)
- waiting to lock <0x00002abd72beb518> (a java.net.SocksSocketImpl)
at java.net.ServerSocket.implAccept(ServerSocket.java:453)
at java.net.ServerSocket.accept(ServerSocket.java:421)
at
org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket(DefaultServerSocketFactory.java:59)
at
org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:211)
at java.lang.Thread.run(Thread.java:619)
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DO NOT REPLY [Bug 51189] Acceptor threads are blocked
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=51189
Mark Thomas <ma...@apache.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |INVALID
--- Comment #1 from Mark Thomas <ma...@apache.org> 2011-05-12 14:36:06 UTC ---
That thread dump is normal.
The users mailing list is the place to seek help if your application becomes
unresponsive.
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Re: DO NOT REPLY [Bug 51189] New: Acceptor threads are blocked
Posted by Filip Hanik - Dev Lists <de...@hanik.com>.
on most OS:es there is a single lock for accepting new connections, so a better default is 1 for acceptor thread count.
there is no performance gain in multiple threads, none that I was ever able to detect.
Filip
On 5/12/2011 2:32 AM, bugzilla@apache.org wrote:
> https://issues.apache.org/bugzilla/show_bug.cgi?id=51189
>
> Bug #: 51189
> Summary: Acceptor threads are blocked
> Product: Tomcat 7
> Version: 7.0.11
> Platform: All
> OS/Version: Linux
> Status: NEW
> Severity: blocker
> Priority: P2
> Component: Connectors
> AssignedTo: dev@tomcat.apache.org
> ReportedBy: helinxiang@gmail.com
> Classification: Unclassified
>
>
> Hi,
>
> I deployed an web application on tomcat 7.0.11, it got acceptor threads
> blocked when it ran two weeks, and the mysql connections weren't released, I
> guess they are the same problem. I don't whether it is a bug of JIoEndpoint.
>
> Thanks a lot.
> EastMountain
>
> Thread dump below:
>
> ""http-bio-8080"-Acceptor-3" daemon prio=10 tid=0x00002aaab4148000 nid=0x141d
> waiting for monitor entry [0x00000000419ac000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:388)
> - waiting to lock<0x00002abd72beb518> (a java.net.SocksSocketImpl)
> at java.net.ServerSocket.implAccept(ServerSocket.java:453)
> at java.net.ServerSocket.accept(ServerSocket.java:421)
> at
> org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket(DefaultServerSocketFactory.java:59)
> at
> org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:211)
> at java.lang.Thread.run(Thread.java:619)
>
> ""http-bio-8080"-Acceptor-2" daemon prio=10 tid=0x00002aaab4898800 nid=0x141c
> runnable [0x00000000411af000]
> java.lang.Thread.State: RUNNABLE
> at java.net.PlainSocketImpl.socketAccept(Native Method)
> at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:390)
> - locked<0x00002abd72beb518> (a java.net.SocksSocketImpl)
> at java.net.ServerSocket.implAccept(ServerSocket.java:453)
> at java.net.ServerSocket.accept(ServerSocket.java:421)
> at
> org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket(DefaultServerSocketFactory.java:59)
> at
> org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:211)
> at java.lang.Thread.run(Thread.java:619)
>
> ""http-bio-8080"-Acceptor-1" daemon prio=10 tid=0x00002aaab45a4800 nid=0x141b
> waiting for monitor entry [0x0000000041930000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:388)
> - waiting to lock<0x00002abd72beb518> (a java.net.SocksSocketImpl)
> at java.net.ServerSocket.implAccept(ServerSocket.java:453)
> at java.net.ServerSocket.accept(ServerSocket.java:421)
> at
> org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket(DefaultServerSocketFactory.java:59)
> at
> org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:211)
> at java.lang.Thread.run(Thread.java:619)
>
> ""http-bio-8080"-Acceptor-0" daemon prio=10 tid=0x00002aaab48a7800 nid=0x141a
> waiting for monitor entry [0x000000004116e000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:388)
> - waiting to lock<0x00002abd72beb518> (a java.net.SocksSocketImpl)
> at java.net.ServerSocket.implAccept(ServerSocket.java:453)
> at java.net.ServerSocket.accept(ServerSocket.java:421)
> at
> org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket(DefaultServerSocketFactory.java:59)
> at
> org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:211)
> at java.lang.Thread.run(Thread.java:619)
>
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