From: Karl Baum <redmine@...>
Date: 2010-10-29T06:39:40+09:00
Subject: [ruby-core:32947] [Backport187-Backport#3999] imap connection thread stuck on wait call

Issue #3999 has been updated by Karl Baum.


Update to this.  I did some thread dumps and it looks like the code above is stuck waiting on this thread:

"Thread-9802" daemon prio=10 tid=0x0000000003e71000 nid=0x5e78 runnable [0x00007f3f6e9c6000]
   java.lang.Thread.State: RUNNABLE
        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:228)
        at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:83)
        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
        - locked <0x00007f3ff95fbe48> (a sun.nio.ch.Util$1)
        - locked <0x00007f3ff95fbe30> (a java.util.Collections$UnmodifiableSet)
        - locked <0x00007f3ff95fba70> (a sun.nio.ch.EPollSelectorImpl)
        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:102)
        at org.jruby.ext.openssl.SSLSocket.waitSelect(SSLSocket.java:240)
        at org.jruby.ext.openssl.SSLSocket.sysread(SSLSocket.java:448)
        at org.jruby.ext.openssl.SSLSocket$i_method_0_1$RUBYINVOKER$sysread.call(org/jruby/ext/openssl/SSLSocket$i_method_0_1$RUBYINVOKER$sysread.gen:65535)
        at org.jruby.internal.runtime.methods.JavaMethod$JavaMethodN.call(JavaMethod.java:630)
        at org.jruby.internal.runtime.methods.DynamicMethod.call(DynamicMethod.java:186)
        at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:146)
        at ruby.jit.fill_rbuff_0CEA65EC1C909A5CF6CB7E8100C08A3F334C6007.rescue_1$RUBY$__rescue___0(buffering.rb:35)
        at ruby.jit.fill_rbuff_0CEA65EC1C909A5CF6CB7E8100C08A3F334C6007.__file__(buffering.rb:34)
        at ruby.jit.fill_rbuff_0CEA65EC1C909A5CF6CB7E8100C08A3F334C6007.__file__(buffering.rb)
        at org.jruby.internal.runtime.methods.JittedMethod.call(JittedMethod.java:119)
        at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:106)
        at ruby.jit.gets_78EF17A1CC25A7841D76040F4F007ECC23A22E41.__file__(buffering.rb:106)
        at ruby.jit.gets_78EF17A1CC25A7841D76040F4F007ECC23A22E41.__file__(buffering.rb)
        at org.jruby.ast.executable.AbstractScript.__file__(AbstractScript.java:39)
        at org.jruby.internal.runtime.methods.JittedMethod.call(JittedMethod.java:153)
        at org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:309)
        at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:148)
        at ruby.jit.get_response_9C1FCDC0EA0182083B570911F4E3FECA09F08611.__file__(imap.rb:994)
        at ruby.jit.get_response_9C1FCDC0EA0182083B570911F4E3FECA09F08611.__file__(imap.rb)
        at org.jruby.internal.runtime.methods.JittedMethod.call(JittedMethod.java:119)
        at org.jruby.runtime.callsite.CachingCallSite.cacheAndCall(CachingCallSite.java:289)
        at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:108)
        at org.jruby.ast.VCallNode.interpret(VCallNode.java:85)
        at org.jruby.ast.LocalAsgnNode.interpret(LocalAsgnNode.java:123)
        at org.jruby.ast.NewlineNode.interpret(NewlineNode.java:104)
        at org.jruby.ast.RescueNode.executeBody(RescueNode.java:199)
        at org.jruby.ast.RescueNode.interpretWithJavaExceptions(RescueNode.java:118)
        at org.jruby.ast.RescueNode.interpret(RescueNode.java:110)
        at org.jruby.ast.BeginNode.interpret(BeginNode.java:83)
        at org.jruby.ast.NewlineNode.interpret(NewlineNode.java:104)
        at org.jruby.ast.BlockNode.interpret(BlockNode.java:71)
        at org.jruby.ast.WhileNode.interpret(WhileNode.java:131)
        at org.jruby.ast.NewlineNode.interpret(NewlineNode.java:104)
        at org.jruby.ast.BlockNode.interpret(BlockNode.java:71)
        at org.jruby.internal.runtime.methods.InterpretedMethod.call(InterpretedMethod.java:139)
        at org.jruby.internal.runtime.methods.DefaultMethod.call(DefaultMethod.java:159)
        at org.jruby.runtime.callsite.CachingCallSite.call(CachingCallSite.java:106)
        at org.jruby.ast.VCallNode.interpret(VCallNode.java:85)
        at org.jruby.ast.NewlineNode.interpret(NewlineNode.java:104)
        at org.jruby.runtime.InterpretedBlock.evalBlockBody(InterpretedBlock.java:373)
        at org.jruby.runtime.InterpretedBlock.yield(InterpretedBlock.java:327)
        at org.jruby.runtime.BlockBody.call(BlockBody.java:78)
        at org.jruby.runtime.Block.call(Block.java:89)
        at org.jruby.RubyProc.call(RubyProc.java:224)
        at org.jruby.RubyProc.call(RubyProc.java:207)
        at org.jruby.internal.runtime.RubyRunnable.run(RubyRunnable.java:94)
        at java.lang.Thread.run(Thread.java:636)

Half of my threads are hanging on "@response_arrival.wait" and the rest is waiting on imap.rb:994 which is s = @sock.gets(CRLF) within the get_response method.

thx.

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http://redmine.ruby-lang.org/issues/show/3999

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