Maybe there is a clue here:
1) Eliminated systemd script and rebooted server.
2) Manually started Tomcat using startup.sh run . Tomcat starts normally.
3) Manually stopped Tomcat using shutdown.sh. Got stack trace:
Using CATALINA_BASE: /opt/tomcat
Using CATALINA_HOME: /opt/tomcat
Using CATALINA_TMPDIR: /opt/tomcat/temp
Using JRE_HOME: /usr
Using CLASSPATH:
/opt/tomcat/bin/bootstrap.jar:/opt/tomcat/bin/tomcat-juli.jar
NOTE: Picked up JDK_JAVA_OPTIONS: --add-opens=java.base/java.lang=ALL-UNNAMED
--add-opens=java.base/java.io=ALL-UNNAMED
--add-opens=java.rmi/sun.rmi.transport=ALL-UNNAMED
Dec 28, 2018 9:57:32 PM org.apache.catalina.startup.Catalina stopServer
SEVERE: Could not contact [localhost:8005] (base port [8005] and offset [0]).
Tomcat may not be running.
Dec 28, 2018 9:57:32 PM org.apache.catalina.startup.Catalina stopServer
SEVERE: Error stopping Catalina
java.net.ConnectException: Connection refused (Connection refused)
at java.base/java.net.PlainSocketImpl.socketConnect(Native Method)
at
java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399)
at
java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242)
at
java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224)
at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:403)
at java.base/java.net.Socket.connect(Socket.java:591)
at java.base/java.net.Socket.connect(Socket.java:540)
at java.base/java.net.Socket.<init>(Socket.java:436)
at java.base/java.net.Socket.<init>(Socket.java:213)
at org.apache.catalina.startup.Catalina.stopServer(Catalina.java:513)
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.apache.catalina.startup.Bootstrap.stopServer(Bootstrap.java:403)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:497)
Tomcat is shut down - it is absent from the process list. I think 8005 is
being contacted *after* Tomcat is shut down, leading to the error.
With systemd involved, the failed shutdown triggers a restart timer, which
evokes a shutdown command, which fails in the same manner leading to the
start/stop loop.
Is this a new bug in 9.0.14 or do I have a configuration problem that manifests
in 9.0.14 for the first time?
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