I take it back - it seems to be a bug. Can you create a jira issue for it? regards,
Karl On Mon, May 26, 2014 at 2:57 PM, Karl Pauls <[email protected]> wrote: > Are you using the latest felix version? > > regards, > > Karl > > > On Mon, May 26, 2014 at 2:44 PM, Benjamin Rogge < > [email protected]> wrote: > >> Hello, >> from time to time we are experiencing a deadlock in the URLHandlers Class >> in Apache Felix. We are using Felix as an embedded OSGi Container and >> instantiate the Felix Framework via ServiceLoader and Framework Factory >> ourselves. The situation is as follows: When Felix.stop and Felix.init are >> called by different threads, eventually URLHandlers. >> unregisterFrameworkListsForContextSearch and >> URLHandlers.registerFrameworkInstance >> are called by the threads. There are two locks: m_frameworks and the Class >> Object of URL (URL.class). registerFrameworkInstance tries to aquire >> m_frameworks first and via the constructor of URLHanders URL.class after >> that. unregisterFrameworkListsForContextSearch tries to aquire URL.class >> first and m_frameworks after that. This is a classic deadlock situation. >> The situation arises in unittests where we frequently start and stop the >> felix framework. >> >> My questions are: Is it valid to call Felix.init after Felix.stop without >> waiting if the framework actually stopped (since stop is asyncronous)? Or >> do we have to wait between Felix.init and Felix.stop? Or would you consider >> this a bug? >> >> Cheers and thanks for your support, >> Benjamin Rogge >> >> >> P.S.: Here is a listing of the stacktraces: >> >> Found one Java-level deadlock: >> ============================= >> "FelixShutdown": >> waiting to lock monitor 0x0000000000ff7710 (object 0x00000007ff33e7f0, >> a java.util.ArrayList), >> which is held by "main" >> "main": >> waiting to lock monitor 0x00000000022c4a08 (object 0x0000000783b06b18, >> a java.lang.Class), >> which is held by "FelixShutdown" >> >> Java stack information for the threads listed above: >> =================================================== >> "FelixShutdown": >> at org.apache.felix.framework.URLHandlers. >> unregisterFrameworkListsForContextSearch(URLHandlers.java:315) >> - waiting to lock <0x00000007ff33e7f0> (a java.util.ArrayList) >> - locked <0x00000007ff33e840> (a java.util.HashMap) >> - locked <0x0000000783b06b18> (a java.lang.Class for java.net.URL) >> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) >> at sun.reflect.NativeMethodAccessorImpl.invoke( >> NativeMethodAccessorImpl.java:57) >> at sun.reflect.DelegatingMethodAccessorImpl.invoke( >> DelegatingMethodAccessorImpl.java:43) >> at java.lang.reflect.Method.invoke(Method.java:606) >> at org.apache.felix.framework.util.SecureAction.invoke( >> SecureAction.java:840) >> at org.apache.felix.framework.URLHandlers. >> unregisterFrameworkInstance(URLHandlers.java:635) >> at org.apache.felix.framework.URLHandlersActivator.stop( >> URLHandlersActivator.java:76) >> at org.apache.felix.framework.util.SecureAction. >> stopActivator(SecureAction.java:667) >> at org.apache.felix.framework.Felix$SystemBundleActivator. >> stop(Felix.java:4715) >> at org.apache.felix.framework.util.SecureAction. >> stopActivator(SecureAction.java:667) >> at org.apache.felix.framework.Felix.stopBundle(Felix.java:2530) >> at org.apache.felix.framework.Felix$2.run(Felix.java:959) >> at java.lang.Thread.run(Thread.java:724) >> "main": >> at org.apache.felix.framework.URLHandlers.<init>( >> URLHandlers.java:150) >> - waiting to lock <0x0000000783b06b18> (a java.lang.Class for >> java.net.URL) >> at org.apache.felix.framework.URLHandlers. >> registerFrameworkInstance(URLHandlers.java:600) >> - locked <0x00000007ff33e7f0> (a java.util.ArrayList) >> at org.apache.felix.framework.URLHandlersActivator.start( >> URLHandlersActivator.java:71) >> at org.apache.felix.framework.util.SecureAction. >> startActivator(SecureAction.java:645) >> at org.apache.felix.framework.Felix$SystemBundleActivator. >> start(Felix.java:4634) >> at org.apache.felix.framework.util.SecureAction. >> startActivator(SecureAction.java:645) >> at org.apache.felix.framework.Felix.init(Felix.java:783) >> // ... Application specific trace >> >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: [email protected] >> For additional commands, e-mail: [email protected] >> >> > > > -- > Karl Pauls > [email protected] > http://twitter.com/karlpauls > http://www.linkedin.com/in/karlpauls > https://profiles.google.com/karlpauls > -- Karl Pauls [email protected] http://twitter.com/karlpauls http://www.linkedin.com/in/karlpauls https://profiles.google.com/karlpauls
