Hello,
we are using a java agent to start a listening process (JMX proxy).
The systemd file for tomcat looks like (snippet):
JAVA_OPTS=... -javaagent:/opt/runtime/jmxagent/jmxagent.jar
-Dorg.goktay.rmiregistry.port=15000 -Dorg.goktay.rmiserver.port=15001
ExecStart=/opt/apache-tomcat/bin/catalina.sh run
ExecStop=/opt/apache-tomcat/bin/catalina.sh stop 60
When starting the service, everything works fine and the java agent is
accessible via the opened port 15000.
However, when stopping tomcat, it seems that a java process is started and
tries to open the same port again:
2670]: Exception in thread "main" java.lang.reflect.InvocationTargetException
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at
java.instrument/sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:493)
at
java.instrument/sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:503)
Caused by: java.rmi.server.ExportException: Port already in use: 15000; nested
exception is:
java.net.BindException: Address already in use
at
java.rmi/sun.rmi.transport.tcp.TCPTransport.listen(TCPTransport.java:346)
at
java.rmi/sun.rmi.transport.tcp.TCPTransport.exportObject(TCPTransport.java:243)
at
java.rmi/sun.rmi.transport.tcp.TCPEndpoint.exportObject(TCPEndpoint.java:415)
at java.rmi/sun.rmi.transport.LiveRef.exportObject(LiveRef.java:147)
at
java.rmi/sun.rmi.server.UnicastServerRef.exportObject(UnicastServerRef.java:235)
at java.rmi/sun.rmi.registry.RegistryImpl.setup(RegistryImpl.java:223)
at java.rmi/sun.rmi.registry.RegistryImpl.<init>(RegistryImpl.java:208)
at
java.rmi/java.rmi.registry.LocateRegistry.createRegistry(LocateRegistry.java:203)
at org.goktay.jmx.JMXAgent.premain(JMXAgent.java:33)
... 6 more
Caused by: java.net.BindException: Address already in use
at java.base/sun.nio.ch.Net.bind0(Native Method)
at java.base/sun.nio.ch.Net.bind(Net.java:555)
at java.base/sun.nio.ch.Net.bind(Net.java:544)
at java.base/sun.nio.ch.NioSocketImpl.bind(NioSocketImpl.java:643)
at java.base/java.net.ServerSocket.bind(ServerSocket.java:388)
at java.base/java.net.ServerSocket.<init>(ServerSocket.java:274)
at java.base/java.net.ServerSocket.<init>(ServerSocket.java:167)
at
java.rmi/sun.rmi.transport.tcp.TCPDirectSocketFactory.createServerSocket(TCPDirectSocketFactory.java:45)
at
java.rmi/sun.rmi.transport.tcp.TCPEndpoint.newServerSocket(TCPEndpoint.java:673)
at
java.rmi/sun.rmi.transport.tcp.TCPTransport.listen(TCPTransport.java:335)
... 14 more
*** java.lang.instrument ASSERTION FAILED ***: "result" with message agent
load/premain call failed at
src/java.instrument/share/native/libinstrument/JPLISAgent.c line: 422
The premain method is entered again and of course the port is already used.
Is there a way to stop tomcat without re-entering the java agent?
Using shutdown.sh shows the same problem.
Thanks in advance!
Thomas
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