[jboss-jira] [JBoss JIRA] (WFLY-847) Strange hangup during stopping of server - must be killed by SIGKILL

Strange hangup during stopping of server - must be killed by SIGKILL -------------------------------------------------------------------- Key: WFLY-847 URL: https://issues.jboss.org/browse/WFLY-847 Project: WildFly Issue Type: Bug Components: Server Reporter: Pavel Janousek Priority: Critical During investigation another JIRA (AS7-3607) I've affected by another issue too. Let say - you have machine after successful reboot. You should prepare network environment as described in AS7-3607, the only one difference is you must disable loopback interface too (ip link set dev lo down). Now, when you try to start AS7, everything is OK, more precisely is the same as in other issue (AS7-3607). BUT - when you hit Ctrl-C now - you try to stop server - it hang-up and report only: {code} 17:05:23,502 INFO [org.jboss.as] (Controller Boot Thread) JBoss EAP 6.0.0.Alpha2 (AS 7.1.0.CR1-redhat-1) started in 14012ms - Started 158 of 228 services (68 services are passive or on-demand) ^C17:05:50,274 INFO [org.jboss.as.messaging] (MSC service thread 1-2) JBAS011605: Unbound messaging object to jndi name java:/queue/test 17:05:50,279 INFO [org.jboss.as.osgi] (MSC service thread 1-1) JBAS011921: Stopping OSGi Framework 17:05:50,279 INFO [org.jboss.as.messaging] (MSC service thread 1-2) JBAS011605: Unbound messaging object to jndi name java:/RemoteConnectionFactory 17:05:50,282 INFO [org.jboss.as.messaging] (MSC service thread 1-2) JBAS011605: Unbound messaging object to jndi name java:/ConnectionFactory 17:05:50,341 INFO [org.jboss.as.logging] JBAS011503: Restored bootstrap log handlers 17:05:50,350 INFO [jacorb.poa] POA IRPOA destroyed 17:05:50,381 INFO [org.hornetq.core.server.impl.HornetQServerImpl] HornetQ Server version 2.2.7.Final (HQ_2_2_7_FINAL_AS7, 121) [3fe9aa6a-4d86-11e1-b2c6-000000000001] stopped 17:05:50,411 INFO [jacorb.poa] POA Naming destroyed 17:05:50,434 INFO [jacorb.poa] POA RootPOA destroyed 17:05:50,440 INFO [com.arjuna.ats.jbossatx] ARJUNA032018: Destroying TransactionManagerService 17:05:50,442 INFO [com.arjuna.ats.jbossatx] ARJUNA032014: Stopping transaction recovery manager 17:05:50,441 INFO [jacorb.orb] prepare ORB for shutdown... 17:05:50,442 INFO [jacorb.orb] ORB going down... 17:05:50,446 INFO [jacorb.orb.iiop] Listener exited 17:05:50,447 INFO [jacorb.orb] ORB shutdown complete 17:05:50,447 INFO [jacorb.orb] ORB run, exit ^Z [1]+ Stopped ./standalone.sh [pjanouse@fedora15-vrt1 bin]$ kill -9 %1 [1]+ Killed ./standalone.sh [pjanouse@fedora15-vrt1 bin]$ {code} As you can see, it can be killed only by SIGKILL signal. More strange is when you now enable loopback interface again (ip link set dev lo up), start/stop sequence works fine (as expected). And the strangest is when you disable loopback again, it works fine as in previous step - everything works as you can expect. I think it is related to some network issue, but I can't be more precise now, I can't find any other aspect why it is occurred after reboot only. I try also several attempts (loopback interface disabled) during let say 10 minutes (due to attempt to eliminate resolver/DNS timeouts etc.), but until I did up/down sequence in lo interface, behavior was the same - only SIGKILL stops it. I try it several times, after several reboot my instance inside VirtualBox and behavior is the same - so it isn't accind situation. So I hope it isn't related to only network stack implementation/virtualization inside VirtualBox and is reproducible in another linux box too.