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From "sangraal aiken" <sangr...@gmail.com>
Subject Re: Doc add limit
Date Wed, 26 Jul 2006 18:23:44 GMT
Right now the heap is set to 512M but I've increased it up to 2GB and yet it
still hangs at the same number 6,144...

Here's something interesting... I pushed this code over to a different
server and tried an update. On that server it's hanging on #5,267. Then
tomcat seems to try to reload the webapp... indefinitely.

So I guess this is looking more like a tomcat problem more than a
lucene/solr problem huh?

-Sangraal

On 7/26/06, Yonik Seeley <yseeley@gmail.com> wrote:
>
> So it looks like your client is hanging trying to send somethig over
> the socket to the server and blocking... probably because Tomcat isn't
> reading anything from the socket because it's busy trying to restart
> the webapp.
>
> What is the heap size of the server? try increasing it... maybe tomcat
> could have detected low memory and tried to reload the webapp.
>
> -Yonik
>
> On 7/26/06, sangraal aiken <sangraal@gmail.com> wrote:
> > Thanks for you help Yonik, I've responded to your questions below:
> >
> > On 7/26/06, Yonik Seeley <yseeley@gmail.com> wrote:
> > >
> > > It's possible it's not hanging, but just takes a long time on a
> > > specific add.  This is because Lucene will occasionally merge
> > > segments.  When very large segments are merged, it can take a long
> > > time.
> >
> >
> > I've left it running (hung) for up to a half hour at a time and I've
> > verified that my cpu idles during the hang. I have witnessed much
> shorter
> > hangs on the ramp up to my 6,144 limit but they have been more like 2 -
> 10
> > seconds in length. Perhaps this is the Lucene merging you mentioned.
> >
> > In the log file, add commands are followed by the number of
> > > milliseconds the operation took.  Next time Solr hangs, wait for a
> > > number of minutes until you see the operation logged and note how long
> > > it took.
> >
> >
> > Here are the last 5 log entries before the hang the last one is doc
> #6,144.
> > Also it looks like Tomcat is trying to redeploy the webapp those last
> tomcat
> > entries repeat indefinitely every 10 seconds or so. Perhaps this is a
> Tomcat
> > problem?
> >
> > Jul 26, 2006 1:25:28 PM org.apache.solr.core.SolrCore update
> > INFO: add (id=110705) 0 36596
> > Jul 26, 2006 1:25:28 PM org.apache.solr.core.SolrCore update
> > INFO: add (id=110700) 0 36600
> > Jul 26, 2006 1:25:28 PM org.apache.solr.core.SolrCore update
> > INFO: add (id=110688) 0 36603
> > Jul 26, 2006 1:25:28 PM org.apache.solr.core.SolrCore update
> > INFO: add (id=110690) 0 36608
> > Jul 26, 2006 1:25:28 PM org.apache.solr.core.SolrCore update
> > INFO: add (id=110686) 0 36611
> > Jul 26, 2006 1:25:36 PM
> org.apache.catalina.startup.HostConfigcheckResources
> > FINE: Checking context[] redeploy resource /source/solr/apache-
> tomcat-5.5.17
> > /webapps/ROOT
> > Jul 26, 2006 1:25:36 PM
> org.apache.catalina.startup.HostConfigcheckResources
> > FINE: Checking context[] redeploy resource /source/solr/apache-
> tomcat-5.5.17
> > /webapps/ROOT/META-INF/context.xml
> > Jul 26, 2006 1:25:36 PM
> org.apache.catalina.startup.HostConfigcheckResources
> > FINE: Checking context[] reload resource /source/solr/apache-
> tomcat-5.5.17
> > /webapps/ROOT/WEB-INF/web.xml
> > Jul 26, 2006 1:25:36 PM
> org.apache.catalina.startup.HostConfigcheckResources
> > FINE: Checking context[] reload resource /source/solr/apache-
> tomcat-5.5.17
> > /webapps/ROOT/META-INF/context.xml
> > Jul 26, 2006 1:25:36 PM
> org.apache.catalina.startup.HostConfigcheckResources
> > FINE: Checking context[] reload resource /source/solr/apache-
> tomcat-5.5.17
> > /conf/context.xml
> >
> > How many documents are in the index before you do a batch that causes
> > > a hang?  Does it happen on the first batch?  If so, you might be
> > > seeing some other bug.  What appserver are you using?  Do the admin
> > > pages respond when you see this hang?  If so, what does a stack trace
> > > look like?
> >
> >
> > I actually don't think I had the problem on the first batch, in fact my
> > first batch contained very close to 6,144 documents so perhaps there is
> a
> > relation there. Right now, I'm adding to an index with close to 90,000
> > documents in it.
> > I'm running Tomcat 5.5.17 and the admin pages respond just fine when
> it's
> > hung... I did a thread dump and this is the trace of my update:
> >
> > "http-8080-Processor25" Id=33 in RUNNABLE (running in native) total cpu
> > time=6330.7360ms user time=5769.5920ms
> >      at java.net.SocketOutputStream.socketWrite0(Native Method)
> >      at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java
> :92)
> >      at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
> >      at java.io.BufferedOutputStream.write(BufferedOutputStream.java
> :105)
> >      at java.io.PrintStream.write(PrintStream.java:412)
> >      at java.io.ByteArrayOutputStream.writeTo(ByteArrayOutputStream.java
> > :112)
> >      at sun.net.www.http.HttpClient.writeRequests(HttpClient.java:533)
> >      at sun.net.www.protocol.http.HttpURLConnection.writeRequests(
> > HttpURLConnection.java:410)
> >      at sun.net.www.protocol.http.HttpURLConnection.getInputStream(
> > HttpURLConnection.java:934)
> >      at com.gawker.solr.update.GanjaUpdate.doUpdate(GanjaUpdate.java
> :169)
> >      at com.gawker.solr.update.GanjaUpdate.update(GanjaUpdate.java:62)
> >      at org.apache.jsp.update_jsp._jspService(update_jsp.java:57)
> >      at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java
> :97)
> >      at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
> >      at org.apache.jasper.servlet.JspServletWrapper.service(
> > JspServletWrapper.java:332)
> >      at org.apache.jasper.servlet.JspServlet.serviceJspFile(
> JspServlet.java
> > :314)
> >      at org.apache.jasper.servlet.JspServlet.service(JspServlet.java
> :264)
> >      at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
> >      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
> (
> > ApplicationFilterChain.java:252)
> >      at org.apache.catalina.core.ApplicationFilterChain.doFilter(
> > ApplicationFilterChain.java:173)
> >      at org.apache.catalina.core.StandardWrapperValve.invoke(
> > StandardWrapperValve.java:213)
> >      at org.apache.catalina.core.StandardContextValve.invoke(
> > StandardContextValve.java:178)
> >      at org.apache.catalina.core.StandardHostValve.invoke(
> > StandardHostValve.java:126)
> >      at org.apache.catalina.valves.ErrorReportValve.invoke(
> > ErrorReportValve.java:105)
> >      at org.apache.catalina.core.StandardEngineValve.invoke(
> > StandardEngineValve.java:107)
> >      at org.apache.catalina.connector.CoyoteAdapter.service(
> > CoyoteAdapter.java:148)
> >      at org.apache.coyote.http11.Http11Processor.process(
> > Http11Processor.java:869)
> >      at
> >
> org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection
> > (Http11BaseProtocol.java:664)
> >      at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(
> > PoolTcpEndpoint.java:527)
> >      at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(
> > LeaderFollowerWorkerThread.java:80)
> >      at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(
> > ThreadPool.java:684)
> >      at java.lang.Thread.run(Thread.java:613)
> >
> >
> > -Yonik
> > >
> > >
> > > On 7/26/06, sangraal aiken <sangraal@gmail.com> wrote:
> > > > Hey there... I'm having an issue with large doc updates on my solr
> > > > installation. I'm adding in batches between 2-20,000 docs at a time
> and
> > > I've
> > > > noticed Solr seems to hang at 6,144 docs every time. Breaking the
> adds
> > > into
> > > > smaller batches works just fine, but I was wondering if anyone knew
> why
> > > this
> > > > would happen. I've tried doubling memory as well as tweaking various
> > > config
> > > > options but nothing seems to let me break the 6,144 barrier.
> > > >
> > > > This is the output from Solr admin. Any help would be greatly
> > > appreciated.
> > > >
> > > >
> > > > *name: * updateHandler  *class: *
> > > > org.apache.solr.update.DirectUpdateHandler2  *version: * 1.0
> > >   *description:
> > > > * Update handler that efficiently directly updates the on-disk main
> > > lucene
> > > > index  *stats: *commits : 0
> > > > optimizes : 0
> > > > docsPending : 6144
> > > > deletesPending : 6144
> > > > adds : 6144
> > > > deletesById : 0
> > > > deletesByQuery : 0
> > > > errors : 0
> > > > cumulative_adds : 6144
> > > > cumulative_deletesById : 0
> > > > cumulative_deletesByQuery : 0
> > > > cumulative_errors : 0
> > > > docsDeleted : 0
>

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