Ich benutze Tomcat Server und wenn ich Thread Dump nahm ich sehe viele Threads sind blockiert (172) und andere Threads sind IN_NATIVE (27). Fast viele blockierte Threads sind wie Smiler nach unten. Kann jemand helfen, was der Grund sein könnte? Mein 8GB OldGen Speicherplatz ist voll. Nach dem Ausführen von GC wird auch nicht freigegeben.Viele Threads sind blockiert und Speicher von alten Gen nicht freizugeben
blockierten Threads:
Thread 22614 - threadId:Thread 22614 - state:BLOCKED
stackTrace:
- java.net.SocketInputStream.socketRead0(java.io.FileDescriptor, byte[], int, int, int) @bci=0 (Compiled frame; information may be imprecise)
- java.net.SocketInputStream.read(byte[], int, int, int) @bci=87, line=152 (Compiled frame)
- java.net.SocketInputStream.read(byte[], int, int) @bci=11, line=122 (Compiled frame)
- org.apache.coyote.http11.InternalInputBuffer.fill(boolean) @bci=59, line=512 (Compiled frame)
- org.apache.coyote.http11.InternalInputBuffer.fill() @bci=2, line=497 (Compiled frame)
- org.apache.coyote.http11.Http11Processor.process(org.apache.tomcat.util.net.SocketWrapper) @bci=263, line=203 (Compiled frame)
- org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(org.apache.tomcat.util.net.SocketWrapper, org.apache.tomcat.util.net.SocketStatus) @bci=96, line=515 (Compiled frame)
- org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run() @bci=130, line=302 (Compiled frame)
- java.util.concurrent.ThreadPoolExecutor.runWorker(java.util.concurrent.ThreadPoolExecutor$Worker) @bci=95, line=1145 (Compiled frame)
- java.util.concurrent.ThreadPoolExecutor$Worker.run() @bci=5, line=615 (Interpreted frame)
- java.lang.Thread.run() @bci=11, line=745 (Interpreted frame)
Thread 23677 - threadId:Thread 23677 - state:BLOCKED
stackTrace:
- sun.misc.Unsafe.park(boolean, long) @bci=0 (Compiled frame; information may be imprecise)
- java.util.concurrent.locks.LockSupport.parkNanos(java.lang.Object, long) @bci=20, line=226 (Compiled frame)
- java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(long) @bci=68, line=2082 (Compiled frame)
- java.util.concurrent.LinkedBlockingQueue.poll(long, java.util.concurrent.TimeUnit) @bci=62, line=467 (Compiled frame)
- org.apache.tomcat.util.threads.TaskQueue.poll(long, java.util.concurrent.TimeUnit) @bci=3, line=86 (Compiled frame)
- org.apache.tomcat.util.threads.TaskQueue.poll(long, java.util.concurrent.TimeUnit) @bci=3, line=32 (Compiled frame)
- java.util.concurrent.ThreadPoolExecutor.getTask() @bci=141, line=1068 (Compiled frame)
- java.util.concurrent.ThreadPoolExecutor.runWorker(java.util.concurrent.ThreadPoolExecutor$Worker) @bci=26, line=1130 (Compiled frame)
- java.util.concurrent.ThreadPoolExecutor$Worker.run() @bci=5, line=615 (Interpreted frame)
- java.lang.Thread.run() @bci=11, line=745 (Interpreted frame)
Thread 23674 - threadId:Thread 23674 - state:BLOCKED
stackTrace:
- com.mysql.jdbc.SingleByteCharsetConverter.toString(byte[], int, int) @bci=1, line=322 (Compiled frame)
- com.mysql.jdbc.ResultSetRow.getString(java.lang.String, com.mysql.jdbc.MySQLConnection, byte[], int, int) @bci=54, line=797 (Compiled frame)
- com.mysql.jdbc.ByteArrayRow.getString(int, java.lang.String, com.mysql.jdbc.MySQLConnection) @bci=24, line=72 (Compiled frame)
- com.mysql.jdbc.ResultSetImpl.getStringInternal(int, boolean) @bci=155, line=5699 (Compiled frame)
- com.mysql.jdbc.ResultSetImpl.getString(int) @bci=3, line=5576 (Compiled frame)
- com.mysql.jdbc.ResultSetImpl.getString(java.lang.String) @bci=6, line=5616 (Compiled frame)
- com.mchange.v2.c3p0.impl.NewProxyResultSet.getString(java.lang.String) @bci=19, line=3342 (Compiled frame)
- org.hibernate.type.StringType.get(java.sql.ResultSet, java.lang.String) @bci=2, line=41 (Compiled frame)
- org.hibernate.type.NullableType.nullSafeGet(java.sql.ResultSet, java.lang.String) @bci=3, line=184 (Compiled frame)
- org.hibernate.type.NullableType.nullSafeGet(java.sql.ResultSet, java.lang.String, org.hibernate.engine.SessionImplementor, java.lang.Object) @bci=3, line=210 (Compiled frame)
Nun, der Thread Dump scheint nicht genau zu sein. 'Unsafe.park' ist ein TIMED_WAITING und socket.read wartet. Könnten Sie einen Thread-Dump über 'kill -3' erzeugen? Es enthält die Adresse für die Objekte, die Threads blockieren, so dass Sie beispielsweise prüfen können, ob ein Deadlock vorliegt. –
bashnesnos