Re: ConcurrentModificationException while starting AG1.1

[Manu George]

Hi David,
      I just compared the file on your page with the file in one of my builds of G. It seems to be missing two files mbeans-descriptors.dtd and ant.properties. Was these files removed on purpose?

Regards
Manu

On 5/9/06, Manu George <[EMAIL PROTECTED]> wrote:

Thanks David. Can I take this jar
(http://people.apache.org/~djencks/maven/commons-modeler/jars/commons-modeler-1.2-GERONIMO-SNAPSHOT.jar ) and replace the one in a previous version of G say 1.0? Will it be fine? Or do I have to do a rebuild?

Regards

Manu

On 5/9/06, David Jencks < [EMAIL PROTECTED]> wrote:

I've put a private build of commons-modeler on my apache page and modified the g. build to use it.  Could you rebuild g (you will need a clean build after dain's changes) and see if this CME is fixed?

thanks

david jencks

On May 8, 2006, at 2:30 PM, David Jencks wrote:

I've opened

http://issues.apache.org/bugzilla/show_bug.cgi?id=39521

for this and I wrote a patch to possibly fix it.  I'm going to push a private jar for this and set up the g. build to use it.  

I also opened  http://issues.apache.org/jira/browse/GERONIMO-1999 for us to track this problem

thanks

david jencks

On May 8, 2006, at 3:33 AM, Phani Madgula wrote:

Hi,

I am getting the following exception, quite unfrequently, may be once

in 25 times, while starting AG1.1

jvm 1    | 08:24:25,762 ERROR [Registry] Error registering Geronimo:type=Request

Processor,worker=http-localhost%2F127.0.0.1-8453,name=HttpRequest0

jvm 1    | java.util.ConcurrentModificationException: concurrent access to HashM

ap attempted by Thread[http-localhost%2F127.0.0.1-8453-Processor25,5,main]

jvm 1    |      at java.util.HashMap.onEntry(HashMap.java :205)

jvm 1    |      at java.util.HashMap.transfer(HashMap.java:510)

jvm 1    |      at java.util.HashMap.resize (HashMap.java:500)

jvm 1    |      at java.util.HashMap.addEntry(HashMap.java:800)

jvm 1    |      at java.util.HashMap.put (HashMap.java:441)

jvm 1    |      at org.apache.commons.modeler.Registry.addManagedBean(Registry.j

ava:457)

jvm 1    |      at org.apache.commons.modeler.Registry.loadDescriptors(Registry.

java:938)

jvm 1    |      at org.apache.commons.modeler.Registry.findManagedBean(Registry.

java:719)

jvm 1    |      at org.apache.commons.modeler.Registry.findManagedBean (Registry.

java:1047)

jvm 1    |      at org.apache.commons.modeler.Registry.registerComponent(Registr

y.java:859)

jvm 1    |      at org.apache.coyote.http11.Http11Protocol$JmxHttp11ConnectionHa

ndler.init(Http11Protocol.java:175)

jvm 1    |      at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.getInit

Data(LeaderFollowerWorkerThread.java:48)

jvm 1    |      at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run

(ThreadPool.java:686)

jvm 1    |       at java.lang.Thread.run(Thread.java:797)

jvm 1    | 08:24:25,762 ERROR [Registry] Error loading jar:file:/D:/ccviews/d_sj

c_tk4s_f5887_pathfinder_wasce_only/v3tools/thirdparty/was_ce/test/was- ce-1.1.0/r

epository/tomcat/tomcat-ajp/5.5.15/tomcat-ajp-5.5.15.jar!/org/apache/jk/mbeans-d

escriptors.xml

jvm 1    | 08:24:25,762 WARN  [Http11BaseProtocol] Error registering request

I saw that the Registry class is not thread-safe. In the method,

Http11Protocol:JmxHttp11ConnectionHandler:init()

there is a call to Registry.getRegistry(null, null).registerComponent(

rp, rpName, null)

Should this be synchronized to resolve the problem?

Can we synchronize it? Any suggestions?

Regards

phani