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WLS 12.1.2+ 버전에서 weblogic.socket.NIOSocketMuxer 사용으로 인한 성능이슈 (Doc ID 2330008.1)

Last updated on MAY 09, 2019

적용 대상:

Oracle WebLogic Server - 버전 12.1.2.0.0 과(와) 그 후속
이 문서의 내용은 모든 플랫폼에 적용됩니다.

증상

LDAPConnThread 가   높은 CPU 리소스사용율을 보이며 runnable 상태입니다.

하기와 같은 스텍을 WLS의 stdout.log 로그상에서 확인할수 있습니다:

"LDAPConnThread-602 ldaps://<HOST>:<PORT>" daemon prio=10 tid=<TID> nid=<NID> runnable [0x00007f9b69df9000]
java.lang.Thread.State: RUNNABLE
at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)
at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:79)
at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
- locked <0x0000000789f2b040> (a sun.nio.ch.Util$2)
- locked <0x0000000789f2b030> (a java.util.Collections$UnmodifiableSet)
- locked <0x0000000789f2adf8> (a sun.nio.ch.EPollSelectorImpl)
at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
at weblogic.socket.NIOSocketMuxer$NIOInputStream.readInternal(NIOSocketMuxer.java:815)
at weblogic.socket.NIOSocketMuxer$NIOInputStream.read(NIOSocketMuxer.java:759)
at weblogic.socket.NIOSocketMuxer$NIOInputStream.read(NIOSocketMuxer.java:742)
at weblogic.socket.JSSEFilterImpl.readFromNetwork(JSSEFilterImpl.java:462)
at weblogic.socket.JSSEFilterImpl.read(JSSEFilterImpl.java:424)
at weblogic.socket.JSSESocket$JSSEInputStream.read(JSSESocket.java:64)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
at java.io.BufferedInputStream.read(BufferedInputStream.java:254)
- locked <0x00000007fbdcfc08> (a java.io.BufferedInputStream)
at netscape.ldap.ber.stream.BERElement.getElement(Unknown Source)
at netscape.ldap.LDAPConnThread.run(Unknown Source)
at java.lang.Thread.run(Thread.java:745)

... 또는 ...

"LDAPConnThread-584 ldaps://<HOST>:<PORT>" daemon prio=10 tid=<TID> nid=<NID> runnable [0x00007f9b6b7f6000]
java.lang.Thread.State: RUNNABLE
at sun.nio.ch.EPollArrayWrapper.interrupt(Native Method)
at sun.nio.ch.EPollArrayWrapper.interrupt(EPollArrayWrapper.java:317)
at sun.nio.ch.EPollSelectorImpl.wakeup(EPollSelectorImpl.java:193)
- locked <0x00000007973c95a0> (a java.lang.Object)
at java.nio.channels.spi.AbstractSelector$1.interrupt(AbstractSelector.java:210)
at java.nio.channels.spi.AbstractSelector.begin(AbstractSelector.java:216)
at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:78)
at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
- locked <0x00000007973c72d8> (a sun.nio.ch.Util$2)
- locked <0x00000007973c72c8> (a java.util.Collections$UnmodifiableSet)
- locked <0x00000007973c70a0> (a sun.nio.ch.EPollSelectorImpl)
at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
at weblogic.socket.NIOSocketMuxer$NIOInputStream.readInternal(NIOSocketMuxer.java:815)
at weblogic.socket.NIOSocketMuxer$NIOInputStream.read(NIOSocketMuxer.java:759)
at weblogic.socket.NIOSocketMuxer$NIOInputStream.read(NIOSocketMuxer.java:742)
at weblogic.socket.JSSEFilterImpl.readFromNetwork(JSSEFilterImpl.java:462)
at weblogic.socket.JSSEFilterImpl.read(JSSEFilterImpl.java:424)
at weblogic.socket.JSSESocket$JSSEInputStream.read(JSSESocket.java:64)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
at java.io.BufferedInputStream.read(BufferedInputStream.java:254)
- locked <0x000000079c4014f8> (a java.io.BufferedInputStream)
at netscape.ldap.ber.stream.BERElement.getElement(Unknown Source)
at netscape.ldap.LDAPConnThread.run(Unknown Source)
at java.lang.Thread.run(Thread.java:745)

... 또는...

"LDAPConnThread-579 ldaps://<HOST>:<PORT>" daemon prio=10 tid=<TID> nid=<NID> runnable [0x00007f9b6b9f8000]
java.lang.Thread.State: RUNNABLE
at sun.nio.ch.IOUtil.drain(Native Method)
at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:90)
- locked <0x000000078a2f6e48> (a java.lang.Object)
at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
- locked <0x000000078a2f6b48> (a sun.nio.ch.Util$2)
- locked <0x000000078a2f6b38> (a java.util.Collections$UnmodifiableSet)
- locked <0x000000078a2f6910> (a sun.nio.ch.EPollSelectorImpl)
at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
at weblogic.socket.NIOSocketMuxer$NIOInputStream.readInternal(NIOSocketMuxer.java:815)
at weblogic.socket.NIOSocketMuxer$NIOInputStream.read(NIOSocketMuxer.java:759)
at weblogic.socket.NIOSocketMuxer$NIOInputStream.read(NIOSocketMuxer.java:742)
at weblogic.socket.JSSEFilterImpl.readFromNetwork(JSSEFilterImpl.java:462)
at weblogic.socket.JSSEFilterImpl.read(JSSEFilterImpl.java:424)
at weblogic.socket.JSSESocket$JSSEInputStream.read(JSSESocket.java:64)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
at java.io.BufferedInputStream.read(BufferedInputStream.java:254)
- locked <0x000000079c2dc630> (a java.io.BufferedInputStream)
at netscape.ldap.ber.stream.BERElement.getElement(Unknown Source)
at netscape.ldap.LDAPConnThread.run(Unknown Source)
at java.lang.Thread.run(Thread.java:745)

 

 

변경 내역

WebLogic Server 12.1.2 이상에서 기본 muxer가 weblogic.socket.NIOSocketMuxer로 변경되었습니다.

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