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From "Guillaume Nodet (JIRA)" <j...@apache.org>
Subject [jira] [Created] (KARAF-2361) ConcurrentModificationException when completing commands
Date Tue, 18 Jun 2013 08:23:19 GMT
Guillaume Nodet created KARAF-2361:
--------------------------------------

             Summary: ConcurrentModificationException when completing commands
                 Key: KARAF-2361
                 URL: https://issues.apache.org/jira/browse/KARAF-2361
             Project: Karaf
          Issue Type: Bug
          Components: karaf-shell
    Affects Versions: 3.0.0.RC1, 2.3.1, 2.4.0
         Environment: {code}
2013-06-18 10:16:09,756 | INFO  | l Console Thread | Console                          | araf.shell.console.jline.Console
 200 | 14 - org.apache.karaf.shell.console - 2.3.0.redhat-610-SNAPSHOT | Exception caught
while executing command
java.util.ConcurrentModificationException
	at java.util.LinkedHashMap$LinkedHashIterator.nextEntry(LinkedHashMap.java:394)[:1.7.0_12-ea]
	at java.util.LinkedHashMap$KeyIterator.next(LinkedHashMap.java:405)[:1.7.0_12-ea]
	at java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1067)[:1.7.0_12-ea]
	at java.util.AbstractCollection.addAll(AbstractCollection.java:341)[:1.7.0_12-ea]
	at java.util.HashSet.<init>(HashSet.java:117)[:1.7.0_12-ea]
	at org.apache.karaf.shell.console.completer.CommandsCompleter.checkData(CommandsCompleter.java:85)[14:org.apache.karaf.shell.console:2.3.0.redhat-610-SNAPSHOT]
	at org.apache.karaf.shell.console.completer.CommandsCompleter.complete(CommandsCompleter.java:76)[14:org.apache.karaf.shell.console:2.3.0.redhat-610-SNAPSHOT]
	at org.apache.karaf.shell.console.jline.CompleterAsCompletor.complete(CompleterAsCompletor.java:32)[14:org.apache.karaf.shell.console:2.3.0.redhat-610-SNAPSHOT]
	at jline.console.ConsoleReader.complete(ConsoleReader.java:2918)[14:org.apache.karaf.shell.console:2.3.0.redhat-610-SNAPSHOT]
	at jline.console.ConsoleReader.readLine(ConsoleReader.java:2391)[14:org.apache.karaf.shell.console:2.3.0.redhat-610-SNAPSHOT]
	at jline.console.ConsoleReader.readLine(ConsoleReader.java:2098)[14:org.apache.karaf.shell.console:2.3.0.redhat-610-SNAPSHOT]
	at org.apache.karaf.shell.console.jline.Console.readAndParseCommand(Console.java:236)[14:org.apache.karaf.shell.console:2.3.0.redhat-610-SNAPSHOT]
	at org.apache.karaf.shell.console.jline.Console.run(Console.java:172)[14:org.apache.karaf.shell.console:2.3.0.redhat-610-SNAPSHOT]
	at org.apache.karaf.shell.console.jline.DelayedStarted.run(DelayedStarted.java:61)[14:org.apache.karaf.shell.console:2.3.0.redhat-610-SNAPSHOT]
{code}

It's not easy to reproduce (you have to hit the completion tabs while commands are being registered/unregistered),
but the completer is clearly not threadsafe anyway.
            Reporter: Guillaume Nodet




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