2 Replies Latest reply on Nov 26, 2014 2:36 AM by lafr

Getting ClosedWatchServiceException

lafr Nov 17, 2014 3:43 AM

For some time now I see error messages on redeployment of ear and on shutdown of WF server (WF 9 built from sources of github master).

Redeployment means, deleting the ear in deployments folder first and then copying a new one there.

Exceptions are related to the web-modules inside the ear file.

This might be platform dependent, I see it on Solaris SPARC (no AIO). Did not have the chance to test on other platform. But WF server versions 7.x and 8.x did not show these kind of error messages.

Is this a bug? If yes, for whom?

17.11. 09:26:28,811 ERROR [stderr#write] Exception in thread "xnio-file-watcher[Watcher for /mbi/tools/jboss/9.0/standalone/tmp/vfs/deployment/deployment3354b42b562390dd/ws-production.war-cf740e43e13e5a81/]-0" java.nio.file.ClosedWatchServiceException

17.11. 09:26:28,814 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.checkOpen(AbstractWatchService.java:80)

17.11. 09:26:28,815 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.checkKey(AbstractWatchService.java:92)

17.11. 09:26:28,816 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.take(AbstractWatchService.java:119)

17.11. 09:26:28,817 ERROR [stderr#write] at org.xnio.nio.WatchServiceFileSystemWatcher.run(WatchServiceFileSystemWatcher.java:85)

17.11. 09:26:28,818 ERROR [stderr#write] at java.lang.Thread.run(Thread.java:745)

17.11. 09:26:29,092 ERROR [stderr#write] Exception in thread "xnio-file-watcher[Watcher for /mbi/tools/jboss/9.0/standalone/tmp/vfs/deployment/deployment3354b42b562390dd/ws-inventory.war-fde7107a498c07aa/]-0" Exception in thread "xnio-file-watcher[Watcher for /mbi/tools/jboss/9.0/standalone/tmp/vfs/deployment/deployment3354b42b562390dd/ws-purchase.war-fd1ec21ad06d282e/]-0" Exception in thread "xnio-file-watcher[Watcher for /mbi/tools/jboss/9.0/standalone/tmp/vfs/deployment/deployment3354b42b562390dd/ws-core.war-f24fc2188bfe3c19/]-0" Exception in thread "xnio-file-watcher[Watcher for /mbi/tools/jboss/9.0/standalone/tmp/vfs/deployment/deployment3354b42b562390dd/ws-common.war-f365e92f23ae6d53/]-0" Exception in thread "xnio-file-watcher[Watcher for /mbi/tools/jboss/9.0/standalone/tmp/vfs/deployment/deployment3354b42b562390dd/ws-distribution.war-93cb9f7bc6b5de50/]-0" Exception in thread "xnio-file-watcher[Watcher for /mbi/tools/jboss/9.0/standalone/tmp/vfs/deployment/deployment3354b42b562390dd/ws-external.war-dee0da0464cb78b9/]-0" Exception in thread "xnio-file-watcher[Watcher for /mbi/tools/jboss/9.0/standalone/tmp/vfs/deployment/deployment3354b42b562390dd/ws-sales.war-825d809cf9c9aee4/]-0" Exception in thread "xnio-file-watcher[Watcher for /mbi/tools/jboss/9.0/standalone/tmp/vfs/deployment/deployment3354b42b562390dd/ws-planning.war-483df34c3466de90/]-0" Exception in thread "xnio-file-watcher[Watcher for /mbi/tools/jboss/9.0/standalone/tmp/vfs/deployment/deployment3354b42b562390dd/web.war-2c909630ee80cf92/]-0" java.nio.file.ClosedWatchServiceException

17.11. 09:26:29,106 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.checkOpen(AbstractWatchService.java:80)

17.11. 09:26:29,107 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.checkKey(AbstractWatchService.java:92)

17.11. 09:26:29,108 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.take(AbstractWatchService.java:119)

17.11. 09:26:29,109 ERROR [stderr#write] at org.xnio.nio.WatchServiceFileSystemWatcher.run(WatchServiceFileSystemWatcher.java:85)

17.11. 09:26:29,110 ERROR [stderr#write] at java.lang.Thread.run(Thread.java:745)

17.11. 09:26:29,111 ERROR [stderr#write] java.nio.file.ClosedWatchServiceException

17.11. 09:26:29,113 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.checkOpen(AbstractWatchService.java:80)

17.11. 09:26:29,114 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.checkKey(AbstractWatchService.java:92)

17.11. 09:26:29,115 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.take(AbstractWatchService.java:119)

17.11. 09:26:29,115 ERROR [stderr#write] at org.xnio.nio.WatchServiceFileSystemWatcher.run(WatchServiceFileSystemWatcher.java:85)

17.11. 09:26:29,116 ERROR [stderr#write] at java.lang.Thread.run(Thread.java:745)

17.11. 09:26:29,118 ERROR [stderr#write] java.nio.file.ClosedWatchServiceException

17.11. 09:26:29,119 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.checkOpen(AbstractWatchService.java:80)

17.11. 09:26:29,120 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.checkKey(AbstractWatchService.java:92)

17.11. 09:26:29,121 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.take(AbstractWatchService.java:119)

17.11. 09:26:29,121 ERROR [stderr#write] at org.xnio.nio.WatchServiceFileSystemWatcher.run(WatchServiceFileSystemWatcher.java:85)

17.11. 09:26:29,122 ERROR [stderr#write] at java.lang.Thread.run(Thread.java:745)

17.11. 09:26:29,123 ERROR [stderr#write] java.nio.file.ClosedWatchServiceException

17.11. 09:26:29,125 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.checkOpen(AbstractWatchService.java:80)

17.11. 09:26:29,126 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.checkKey(AbstractWatchService.java:92)

17.11. 09:26:29,127 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.take(AbstractWatchService.java:119)

17.11. 09:26:29,128 ERROR [stderr#write] at org.xnio.nio.WatchServiceFileSystemWatcher.run(WatchServiceFileSystemWatcher.java:85)

17.11. 09:26:29,129 ERROR [stderr#write] at java.lang.Thread.run(Thread.java:745)

17.11. 09:26:29,130 ERROR [stderr#write] java.nio.file.ClosedWatchServiceException

17.11. 09:26:29,131 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.checkOpen(AbstractWatchService.java:80)

17.11. 09:26:29,132 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.checkKey(AbstractWatchService.java:92)

17.11. 09:26:29,133 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.take(AbstractWatchService.java:119)

17.11. 09:26:29,188 ERROR [stderr#write] at org.xnio.nio.WatchServiceFileSystemWatcher.run(WatchServiceFileSystemWatcher.java:85)

17.11. 09:26:29,189 ERROR [stderr#write] at java.lang.Thread.run(Thread.java:745)

17.11. 09:26:29,193 ERROR [stderr#write] java.nio.file.ClosedWatchServiceException

17.11. 09:26:29,194 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.checkOpen(AbstractWatchService.java:80)

17.11. 09:26:29,195 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.checkKey(AbstractWatchService.java:92)

17.11. 09:26:29,196 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.take(AbstractWatchService.java:119)

17.11. 09:26:29,197 ERROR [stderr#write] at org.xnio.nio.WatchServiceFileSystemWatcher.run(WatchServiceFileSystemWatcher.java:85)

17.11. 09:26:29,198 ERROR [stderr#write] at java.lang.Thread.run(Thread.java:745)

17.11. 09:26:29,199 ERROR [stderr#write] java.nio.file.ClosedWatchServiceException

17.11. 09:26:29,201 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.checkOpen(AbstractWatchService.java:80)

17.11. 09:26:29,201 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.checkKey(AbstractWatchService.java:92)

17.11. 09:26:29,202 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.take(AbstractWatchService.java:119)

17.11. 09:26:29,203 ERROR [stderr#write] at org.xnio.nio.WatchServiceFileSystemWatcher.run(WatchServiceFileSystemWatcher.java:85)

17.11. 09:26:29,204 ERROR [stderr#write] at java.lang.Thread.run(Thread.java:745)

17.11. 09:26:29,210 ERROR [stderr#write] java.nio.file.ClosedWatchServiceException

17.11. 09:26:29,212 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.checkOpen(AbstractWatchService.java:80)

17.11. 09:26:29,213 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.checkKey(AbstractWatchService.java:92)

17.11. 09:26:29,214 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.take(AbstractWatchService.java:119)

17.11. 09:26:29,215 ERROR [stderr#write] at org.xnio.nio.WatchServiceFileSystemWatcher.run(WatchServiceFileSystemWatcher.java:85)

17.11. 09:26:29,216 ERROR [stderr#write] at java.lang.Thread.run(Thread.java:745)

17.11. 09:26:29,218 ERROR [stderr#write] java.nio.file.ClosedWatchServiceException

17.11. 09:26:29,221 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.checkOpen(AbstractWatchService.java:80)

17.11. 09:26:29,222 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.checkKey(AbstractWatchService.java:92)

17.11. 09:26:29,223 ERROR [stderr#write] at sun.nio.fs.AbstractWatchService.take(AbstractWatchService.java:119)

17.11. 09:26:29,299 ERROR [stderr#write] at org.xnio.nio.WatchServiceFileSystemWatcher.run(WatchServiceFileSystemWatcher.java:85)

17.11. 09:26:29,300 ERROR [stderr#write] at java.lang.Thread.run(Thread.java:745)

1. Re: Getting ClosedWatchServiceException

jaikiran Nov 26, 2014 1:43 AM (in response to lafr)

This is a XNIO thing. So swd847 or dmlloyd will know more of it. What seems to be happening is that a close is being triggered on org.xnio.nio.WatchServiceFileSystemWatcher (which internally closes the WatchService) from a thread and all other threads that are waiting on the next event via the WatchService.take() API get this (IMO harmless) exception. The https://docs.oracle.com/javase/7/docs/api/java/nio/file/WatchService.html javadoc notes it in a couple of places:

The close method may be invoked at any time to close the service causing any threads waiting to retrieve keys, to throw ClosedWatchServiceException.

https://docs.oracle.com/javase/7/docs/api/java/nio/file/WatchService.html#take%28%29
Throws:
ClosedWatchServiceException - if this watch service is closed, or it is closed while waiting for the next key

So I think, it's just a matter of catching this and exiting silently in the org.xnio.nio.WatchServiceFileSystemWatcher code https://github.com/xnio/xnio/blob/3.x/nio-impl/src/main/java/org/xnio/nio/WatchServiceFileSystemWatcher.java#L85
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2. Re: Getting ClosedWatchServiceException

lafr Nov 26, 2014 2:36 AM (in response to jaikiran)

Just found [XNIO-240] ERROR on shutdown with WF 8.2 - JBoss Issue Tracker describing the same problem.
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