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Posted to solr-user@lucene.apache.org by Walter Ferrara <wa...@gmail.com> on 2009/05/04 16:01:30 UTC

DIH ConcurrentModificationException

I've got a ConcurrentModificationException during a cron-ed delta import of
DIH, I'm using multicore solr nightly from hudson 2009-04-02_08-06-47.
I don't know if this stacktrace maybe useful to you, but here it is:

java.util.ConcurrentModificationException
        at java.util.LinkedHashMap$LinkedHashIterator.nextEntry(Unknown
Source)
        at java.util.LinkedHashMap$EntryIterator.next(Unknown Source)
        at java.util.LinkedHashMap$EntryIterator.next(Unknown Source)
        at
org.apache.solr.handler.dataimport.DataImporter.getStatusMessages(DataImporter.java:384)
        at
org.apache.solr.handler.dataimport.DataImportHandler.handleRequestBody(DataImportHandler.java:210
)
        at
org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:131)
        at org.apache.solr.core.SolrCore.execute(SolrCore.java:1333)
        at
org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:303)
        at
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:232)
        at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1089)
        at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:365)
        at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
        at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
        at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
        at
org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
        at
org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:211)
        at
org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
        at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
        at org.mortbay.jetty.Server.handle(Server.java:285)
        at
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:502)
        at
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:821)
        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:513)
        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:208)
        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:378)
        at
org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:226)
        at
org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)

of-course due to the nature of this exception I doubt it can be reproduced
easily (this is the only one I've got, and the croned job runned a lot of
times), but maybe should a synchronized be put somewhere?
ciao,
Walter

Re: DIH ConcurrentModificationException

Posted by Reuben A Christie <ch...@knewco.com>.

  is this fixed in solr-1.4.1 ?
I have seen ConcurrentModificationException during search operation 
using EmbeddedSolrServer, when tested using jmeter with on more than one 
Concurrent users.

best,
Reuben

On 5/5/2009 2:25 AM, Shalin Shekhar Mangar wrote:
> This is fixed in trunk.
>
> 2009/5/5 Noble Paul നോബിള്‍ नोब्ळ्<no...@corp.aol.com>
>
>> hi Walter,
>> it needs synchronization. I shall open a bug.
>>
>>
>>
>> On Mon, May 4, 2009 at 7:31 PM, Walter Ferrara<wa...@gmail.com>
>> wrote:
>>> I've got a ConcurrentModificationException during a cron-ed delta import
>> of
>>> DIH, I'm using multicore solr nightly from hudson 2009-04-02_08-06-47.
>>> I don't know if this stacktrace maybe useful to you, but here it is:
>>>
>>> java.util.ConcurrentModificationException
>>>         at java.util.LinkedHashMap$LinkedHashIterator.nextEntry(Unknown
>>> Source)
>>>         at java.util.LinkedHashMap$EntryIterator.next(Unknown Source)
>>>         at java.util.LinkedHashMap$EntryIterator.next(Unknown Source)
>>>         at
>>>
>> org.apache.solr.handler.dataimport.DataImporter.getStatusMessages(DataImporter.java:384)
>>>         at
>>>
>> org.apache.solr.handler.dataimport.DataImportHandler.handleRequestBody(DataImportHandler.java:210
>>> )
>>>         at
>>>
>> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:131)
>>>         at org.apache.solr.core.SolrCore.execute(SolrCore.java:1333)
>>>         at
>>>
>> org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:303)
>>>         at
>>>
>> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:232)
>>>         at
>>>
>> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1089)
>>>         at
>>> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:365)
>>>         at
>>>
>> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>>>         at
>>> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>>>         at
>>> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
>>>         at
>>> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
>>>         at
>>>
>> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:211)
>>>         at
>>>
>> org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
>>>         at
>>> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
>>>         at org.mortbay.jetty.Server.handle(Server.java:285)
>>>         at
>>> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:502)
>>>         at
>>>
>> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:821)
>>>         at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:513)
>>>         at
>> org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:208)
>>>         at
>> org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:378)
>>>         at
>>>
>> org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:226)
>>>         at
>>>
>> org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)
>>> of-course due to the nature of this exception I doubt it can be
>> reproduced
>>> easily (this is the only one I've got, and the croned job runned a lot of
>>> times), but maybe should a synchronized be put somewhere?
>>> ciao,
>>> Walter
>>>
>>
>>
>> --
>> -----------------------------------------------------
>> Noble Paul | Principal Engineer| AOL | http://aol.com
>>
>
>

--

Re: DIH ConcurrentModificationException

Posted by Shalin Shekhar Mangar <sh...@gmail.com>.

This is fixed in trunk.

2009/5/5 Noble Paul നോബിള്‍ नोब्ळ् <no...@corp.aol.com>

> hi Walter,
> it needs synchronization. I shall open a bug.
>
>
>
> On Mon, May 4, 2009 at 7:31 PM, Walter Ferrara <wa...@gmail.com>
> wrote:
> > I've got a ConcurrentModificationException during a cron-ed delta import
> of
> > DIH, I'm using multicore solr nightly from hudson 2009-04-02_08-06-47.
> > I don't know if this stacktrace maybe useful to you, but here it is:
> >
> > java.util.ConcurrentModificationException
> >        at java.util.LinkedHashMap$LinkedHashIterator.nextEntry(Unknown
> > Source)
> >        at java.util.LinkedHashMap$EntryIterator.next(Unknown Source)
> >        at java.util.LinkedHashMap$EntryIterator.next(Unknown Source)
> >        at
> >
> org.apache.solr.handler.dataimport.DataImporter.getStatusMessages(DataImporter.java:384)
> >        at
> >
> org.apache.solr.handler.dataimport.DataImportHandler.handleRequestBody(DataImportHandler.java:210
> > )
> >        at
> >
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:131)
> >        at org.apache.solr.core.SolrCore.execute(SolrCore.java:1333)
> >        at
> >
> org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:303)
> >        at
> >
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:232)
> >        at
> >
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1089)
> >        at
> > org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:365)
> >        at
> >
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
> >        at
> > org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
> >        at
> > org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
> >        at
> > org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
> >        at
> >
> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:211)
> >        at
> >
> org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
> >        at
> > org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
> >        at org.mortbay.jetty.Server.handle(Server.java:285)
> >        at
> > org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:502)
> >        at
> >
> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:821)
> >        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:513)
> >        at
> org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:208)
> >        at
> org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:378)
> >        at
> >
> org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:226)
> >        at
> >
> org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)
> >
> > of-course due to the nature of this exception I doubt it can be
> reproduced
> > easily (this is the only one I've got, and the croned job runned a lot of
> > times), but maybe should a synchronized be put somewhere?
> > ciao,
> > Walter
> >
>
>
>
> --
> -----------------------------------------------------
> Noble Paul | Principal Engineer| AOL | http://aol.com
>



-- 
Regards,
Shalin Shekhar Mangar.

Re: DIH ConcurrentModificationException

Posted by Noble Paul നോബിള്‍ नोब्ळ् <no...@corp.aol.com>.

hi Walter,
it needs synchronization. I shall open a bug.



On Mon, May 4, 2009 at 7:31 PM, Walter Ferrara <wa...@gmail.com> wrote:
> I've got a ConcurrentModificationException during a cron-ed delta import of
> DIH, I'm using multicore solr nightly from hudson 2009-04-02_08-06-47.
> I don't know if this stacktrace maybe useful to you, but here it is:
>
> java.util.ConcurrentModificationException
>        at java.util.LinkedHashMap$LinkedHashIterator.nextEntry(Unknown
> Source)
>        at java.util.LinkedHashMap$EntryIterator.next(Unknown Source)
>        at java.util.LinkedHashMap$EntryIterator.next(Unknown Source)
>        at
> org.apache.solr.handler.dataimport.DataImporter.getStatusMessages(DataImporter.java:384)
>        at
> org.apache.solr.handler.dataimport.DataImportHandler.handleRequestBody(DataImportHandler.java:210
> )
>        at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:131)
>        at org.apache.solr.core.SolrCore.execute(SolrCore.java:1333)
>        at
> org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:303)
>        at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:232)
>        at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1089)
>        at
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:365)
>        at
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>        at
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>        at
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
>        at
> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
>        at
> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:211)
>        at
> org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
>        at
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
>        at org.mortbay.jetty.Server.handle(Server.java:285)
>        at
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:502)
>        at
> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:821)
>        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:513)
>        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:208)
>        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:378)
>        at
> org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:226)
>        at
> org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)
>
> of-course due to the nature of this exception I doubt it can be reproduced
> easily (this is the only one I've got, and the croned job runned a lot of
> times), but maybe should a synchronized be put somewhere?
> ciao,
> Walter
>



-- 
-----------------------------------------------------
Noble Paul | Principal Engineer| AOL | http://aol.com