was集群应用产生core文件出错

各位专家求助，was集群应用产生core，生成的dump文件达到1G，jvm设置，启动1024m，最大4096m，系统内存是8g的，操作系统是redhat6.0，应用systemerr日志如下：
[11/20/12 9:36:26:408 CST] 00001ccb SystemErr     R Exception in thread "TCPChannel.DCS : 9" java.lang.OutOfMemoryError
[11/20/12 9:36:44:123 CST] 00001ccb SystemErr     R  at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:303)
[11/20/12 9:36:44:123 CST] 00001ccb SystemErr     R  at com.ibm.ws.buffermgmt.impl.WsByteBufferPoolManagerImpl.allocateCommon(WsByteBufferPoolManagerImpl.java:514)
[11/20/12 9:36:44:123 CST] 00001ccb SystemErr     R  at com.ibm.ws.buffermgmt.impl.WsByteBufferPoolManagerImpl.allocateDirect(WsByteBufferPoolManagerImpl.java:450)
[11/20/12 9:36:44:123 CST] 00001ccb SystemErr     R  at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:472)
[11/20/12 9:36:44:123 CST] 00001ccb SystemErr     R  at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:847)
[11/20/12 9:36:44:123 CST] 00001ccb SystemErr     R  at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1498)
[11/20/12 9:36:44:123 CST] 00001cd1 SystemErr     R Exception in thread "LT=0:P=556932:O=0:port=34583" java.lang.OutOfMemoryError
[11/20/12 9:36:44:129 CST] 00001cd1 SystemErr     R  at java.net.PlainSocketImpl.socketAccept(Native Method)
[11/20/12 9:36:44:129 CST] 00001cd1 SystemErr     R  at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:423)
[11/20/12 9:36:44:130 CST] 00001cd1 SystemErr     R  at java.net.ServerSocket.implAccept(ServerSocket.java:462)
[11/20/12 9:36:44:130 CST] 00001cd1 SystemErr     R  at java.net.ServerSocket.accept(ServerSocket.java:433)
[11/20/12 9:36:44:130 CST] 00001cd1 SystemErr     R  at com.ibm.rmi.transport.ListenerThread.run(ListenerThread.java:177)
[11/20/12 10:30:37:047 CST] 00000049 SystemErr     R Warning: validation was turned on but an org.xml.sax.ErrorHandler was not
[11/20/12 10:30:37:047 CST] 00000049 SystemErr     R set, which is probably not what is desired.  Parser will use a default
[11/20/12 10:30:37:047 CST] 00000049 SystemErr     R ErrorHandler to print the first 10 errors.  Please call
[11/20/12 10:30:37:047 CST] 00000049 SystemErr     R the 'setErrorHandler' method to fix this.
[11/20/12 10:30:37:047 CST] 00000049 SystemErr     R Error: URI=jar:file:/opt/IBM/WebSphere/AppServer61/profiles/AppSrv01/rms/rms_war.ear/rms.war/WEB-INF/lib/standard.jar!META-INF/c.tld Line=6: Document root element "taglib", must match DOCTYPE root "null".
[11/20/12 10:30:37:047 CST] 00000049 SystemErr     R Error: URI=jar:file:/opt/IBM/WebSphere/AppServer61/profiles/AppSrv01/rms/rms_war.ear/rms.war/WEB-INF/lib/standard.jar!META-INF/c.tld Line=6: Document is invalid: no grammar found.
[11/20/12 10:30:37:054 CST] 00000049 SystemErr     R Warning: validation was turned on but an org.xml.sax.ErrorHandler was not
[11/20/12 10:30:37:054 CST] 00000049 SystemErr     R set, which is probably not what is desired.  Parser will use a default
[11/20/12 10:30:37:054 CST] 00000049 SystemErr     R ErrorHandler to print the first 10 errors.  Please call
[11/20/12 10:30:37:055 CST] 00000049 SystemErr     R the 'setErrorHandler' method to fix this.
[11/20/12 10:30:37:055 CST] 00000049 SystemErr     R Error: URI=jar:file:/opt/IBM/WebSphere/AppServer61/profiles/AppSrv01/rms/rms_war.ear/rms.war/WEB-INF/lib/standard.jar!META-INF/fmt.tld Line=6: Document root element "taglib", must match DOCTYPE root "null".
[11/20/12 10:30:37:055 CST] 00000049 SystemErr     R Error: URI=jar:file:/opt/IBM/WebSphere/AppServer61/profiles/AppSrv01/rms/rms_war.ear/rms.war/WEB-INF/lib/standard.jar!META-INF/fmt.tld Line=6: Document is invalid: no grammar found.
[11/20/12 10:30:37:056 CST] 00000049 SystemErr     R Warning: validation was turned on but an org.xml.sax.ErrorHandler was not
[11/20/12 10:30:37:056 CST] 00000049 SystemErr     R set, which is probably not what is desired.  Parser will use a default
[11/20/12 10:30:37:056 CST] 00000049 SystemErr     R ErrorHandler to print the first 10 errors.  Please call
[11/20/12 10:30:37:056 CST] 00000049 SystemErr     R the 'setErrorHandler' method to fix this.
[11/20/12 10:30:37:056 CST] 00000049 SystemErr     R Error: URI=jar:file:/opt/IBM/WebSphere/AppServer61/profiles/AppSrv01/rms/rms_war.ear/rms.war/WEB-INF/lib/standard.jar!META-INF/fn.tld Line=6: Document root element "taglib", must match DOCTYPE root "null".
[11/20/12 10:30:37:057 CST] 00000049 SystemErr     R Error: URI=jar:file:/opt/IBM/WebSphere/AppServer61/profiles/AppSrv01/rms/rms_war.ear/rms.war/WEB-INF/lib/standard.jar!META-INF/fn.tld Line=6: Document is invalid: no grammar found.
[11/20/12 10:30:37:058 CST] 00000049 SystemErr     R Warning: validation was turned on but an org.xml.sax.ErrorHandler was not
[11/20/12 10:30:37:058 CST] 00000049 SystemErr     R set, which is probably not what is desired.  Parser will use a default
[11/20/12 10:30:37:058 CST] 00000049 SystemErr     R ErrorHandler to print the first 10 errors.  Please call
[11/20/12 10:30:37:058 CST] 00000049 SystemErr     R the 'setErrorHandler' method to fix this.
[11/20/12 10:30:37:058 CST] 00000049 SystemErr     R Error: URI=jar:file:/opt/IBM/WebSphere/AppServer61/profiles/AppSrv01/rms/rms_war.ear/rms.war/WEB-INF/lib/standard.jar!META-INF/permittedTaglibs.tld Line=6: Document root element "taglib", must match DOCTYPE root "null".
[11/20/12 10:30:37:058 CST] 00000049 SystemErr     R Error: URI=jar:file:/opt/IBM/WebSphere/AppServer61/profiles/AppSrv01/rms/rms_war.ear/rms.war/WEB-INF/lib/standard.jar!META-INF/permittedTaglibs.tld Line=6: Document is invalid: no grammar found.
[11/20/12 10:30:37:059 CST] 00000049 SystemErr     R Warning: validation was turned on but an org.xml.sax.ErrorHandler was not
[11/20/12 10:30:37:059 CST] 00000049 SystemErr     R set, which is probably not what is desired.  Parser will use a default
[11/20/12 10:30:37:060 CST] 00000049 SystemErr     R ErrorHandler to print the first 10 errors.  Please call
[11/20/12 10:30:37:060 CST] 00000049 SystemErr     R the 'setErrorHandler' method to fix this.
[11/20/12 10:30:37:060 CST] 00000049 SystemErr     R Error: URI=jar:file:/opt/IBM/WebSphere/AppServer61/profiles/AppSrv01/rms/rms_war.ear/rms.war/WEB-INF/lib/standard.jar!META-INF/scriptfree.tld Line=6: Document root element "taglib", must match DOCTYPE root "null".
[11/20/12 10:30:37:060 CST] 00000049 SystemErr     R Error: URI=jar:file:/opt/IBM/WebSphere/AppServer61/profiles/AppSrv01/rms/rms_war.ear/rms.war/WEB-INF/lib/standard.jar!META-INF/scriptfree.tld Line=6: Document is invalid: no grammar found.
[11/20/12 10:30:37:065 CST] 00000049 SystemErr     R Warning: validation was turned on but an org.xml.sax.ErrorHandler was not
[11/20/12 10:30:37:065 CST] 00000049 SystemErr     R set, which is probably not what is desired.  Parser will use a default
[11/20/12 10:30:37:065 CST] 00000049 SystemErr     R ErrorHandler to print the first 10 errors.  Please call
[11/20/12 10:30:37:065 CST] 00000049 SystemErr     R the 'setErrorHandler' method to fix this.
[11/20/12 10:30:37:065 CST] 00000049 SystemErr     R Error: URI=jar:file:/opt/IBM/WebSphere/AppServer61/profiles/AppSrv01/rms/rms_war.ear/rms.war/WEB-INF/lib/standard.jar!META-INF/sql.tld Line=6: Document root element "taglib", must match DOCTYPE root "null".
[11/20/12 10:30:37:065 CST] 00000049 SystemErr     R Error: URI=jar:file:/opt/IBM/WebSphere/AppServer61/profiles/AppSrv01/rms/rms_war.ear/rms.war/WEB-INF/lib/standard.jar!META-INF/sql.tld Line=6: Document is invalid: no grammar found.
[11/20/12 10:30:37:071 CST] 00000049 SystemErr     R Warning: validation was turned on but an org.xml.sax.ErrorHandler was not
[11/20/12 10:30:37:071 CST] 00000049 SystemErr     R set, which is probably not what is desired.  Parser will use a default
[11/20/12 10:30:37:071 CST] 00000049 SystemErr     R ErrorHandler to print the first 10 errors.  Please call
[11/20/12 10:30:37:071 CST] 00000049 SystemErr     R the 'setErrorHandler' method to fix this.
[11/20/12 10:30:37:072 CST] 00000049 SystemErr     R Error: URI=jar:file:/opt/IBM/WebSphere/AppServer61/profiles/AppSrv01/rms/rms_war.ear/rms.war/WEB-INF/lib/standard.jar!META-INF/x.tld Line=6: Document root element "taglib", must match DOCTYPE root "null".
[11/20/12 10:30:37:072 CST] 00000049 SystemErr     R Error: URI=jar:file:/opt/IBM/WebSphere/AppServer61/profiles/AppSrv01/rms/rms_war.ear/rms.war/WEB-INF/lib/standard.jar!META-INF/x.tld Line=6: Document is invalid: no grammar found.
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