manifoldcf-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Tamizh Kumaran Thamizharasan <tthamizhara...@worldbankgroup.org>
Subject RE: ManifoldCF documentum indexing issue
Date Wed, 21 Jun 2017 08:55:26 GMT
Hi Karl,

Thanks for the update!!!

As per the response from Solr team, expandMacros=false is added to the output connector as
additional parameter.
After adding  expandMacros=false, the indexing job is getting completed with “Missing content
stream” error for few of the documents and those are not indexed into Solr.

As per our analysis, the pdf document’s file name we are trying to index from documentum
 contains whitespace and special characters like double quotes.
Which makes the file non readable and missing content stream error is thrown.

If there is any work around to overcome this issue, kindly share it with us.

Regards,
Tamizh Kumaran Thamizharasan

From: Karl Wright [mailto:daddywri@gmail.com]
Sent: Wednesday, June 14, 2017 7:20 PM
To: user@manifoldcf.apache.org
Cc: Sharnel Merdeck Pereira; Sundarapandian Arumaidurai Vethasigamani
Subject: Re: ManifoldCF documentum indexing issue

Here's the response:

>>>>>>
Karl -

There’s expandMacros=false, as covered here: https://cwiki.apache.org/confluence/display/solr/Parameter+Substitution

But… what exactly is being sent to Solr?    Is there some kind of “${…” being sent
as a parameter?   Just curious what’s getting you into this in the first place.   But disabling
probably is your most desired solution.

        Erik
<<<<<<

Karl


On Wed, Jun 14, 2017 at 9:36 AM, Karl Wright <daddywri@gmail.com<mailto:daddywri@gmail.com>>
wrote:
Here's the question I posted:

>>>>>>
Hi all,

I've got a ManifoldCF user who is posting content to Solr using the MCF Solr output connector.
 This connector uses SolrJ under the covers -- a fairly recent version -- but also has overridden
some classes to insure that multipart form posts will be used for most content.

The problem is that, for a specific document, the user is getting an ArrayIndexOutOfBounds
exception in Solr, as follows:

>>>>>>
2017-06-14T08:25:16,546 - ERROR [qtp862890654-69725:SolrException@148] - {collection=c:documentum_manifoldcf_stg,
core=x:documentum_manifoldcf_stg_shard1_replica1, node_name=n:**********:8983_solr, replica=r:core_node1,
shard=s:shard1} - java.lang.StringIndexOutOfBoundsException: String index out of range: -296
        at java.lang.String.substring(String.java:1911)
        at org.apache.solr.request.macro.MacroExpander._expand(MacroExpander.java:143)
        at org.apache.solr.request.macro.MacroExpander.expand(MacroExpander.java:93)
        at org.apache.solr.request.macro.MacroExpander.expand(MacroExpander.java:59)
        at org.apache.solr.request.macro.MacroExpander.expand(MacroExpander.java:45)
        at org.apache.solr.request.json.RequestUtil.processParams(RequestUtil.java:157)
        at org.apache.solr.util.SolrPluginUtils.setDefaults(SolrPluginUtils.java:172)
        at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:152)
        at org.apache.solr.core.SolrCore.execute(SolrCore.java:2102)
        at org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:654)
        at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:460)
        at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:257)
        at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:208)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
        at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
        at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
        at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
        at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
        at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
        at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
        at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215)
        at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
        at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
        at org.eclipse.jetty.server.Server.handle(Server.java:499)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
        at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
        at org.eclipse.jetty.io<http://org.eclipse.jetty.io>.AbstractConnection$2.run(AbstractConnection.java:540)
        at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
        at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
        at java.lang.Thread.run(Thread.java:745)
<<<<<<

It looks worrisome to me that there's now possibly some kind of "macro expansion" that is
being triggered within parameters being sent to Solr.  Can anyone tell me either how to (a)
disable this feature, or (b) how the MCF Solr output connector should escape parameters being
posted so that Solr does not attempt any macro expansion?  If the latter, I also need to know
when this feature appeared, since obviously whether or not to do the escaping will depend
on the precise version of the Solr instance involved.

I'm also quite concerned that considerations of backwards compatibility may have been lost
at some point with Solr, since heretofore I could count on older versions of SolrJ working
with newer versions of Solr.  Please clarify what the current policy is....


Thanks,
Karl
<<<<<<



On Wed, Jun 14, 2017 at 9:35 AM, Karl Wright <daddywri@gmail.com<mailto:daddywri@gmail.com>>
wrote:
I posted the pertinent question to the solr dev list.  Let's see what they say.

Thanks,
Karl


On Wed, Jun 14, 2017 at 9:04 AM, Karl Wright <daddywri@gmail.com<mailto:daddywri@gmail.com>>
wrote:
Hi,

The exception in the solr.log should be reported as a Solr bug.  It is not emanating from
the Tika extractor (Solr Cell), but is in Solr itself.

I wish there was an easy fix for this.  The problem is *not* an empty stream; it's that Solr
is attempting to do something with it that it shouldn't.  MCF just gets back a 500 error from
Solr, and we can't recover from that.

>>>>>>
https://**********/webtop/component/drl?versionLabel=CURRENT&objectId=091e8486805142f5
(500)
<<<<<<

Karl




On Wed, Jun 14, 2017 at 8:29 AM, Tamizh Kumaran Thamizharasan <tthamizharasan@worldbankgroup.org<mailto:tthamizharasan@worldbankgroup.org>>
wrote:
Hi Karl,

After configuring Solr to ignore Tika errors by adding Tika transformer in the job, below
behavior is observed.


1)      ManifoldCF fetches the content from documentum, which contains null content and tries
to push it to the output connector(Solr).

2)      Solr couldn’t accept the null as a value and throwing “Missing content stream”
error.

3)      Each agent thread In ManifoldCF internally held-up with different r_object_id’s
that don’t have body content and keeps trying to push the content to Solr  after each failure,
but Solr couldn’t accept the content and throws the same error.

4)      Over the time, the manifold job stops with the error thrown by Solr

Please let know if there is any configuration change which can help us resolve this issue.

Please find the attached manifoldCF error log,Solr error log and agent log.

Regards,
Tamizh Kumaran.

From: Karl Wright [mailto:daddywri@gmail.com<mailto:daddywri@gmail.com>]
Sent: Tuesday, June 13, 2017 2:23 PM
To: user@manifoldcf.apache.org<mailto:user@manifoldcf.apache.org>
Cc: Sharnel Merdeck Pereira; Sundarapandian Arumaidurai Vethasigamani
Subject: Re: ManifoldCF documentum indexing issue

Hi Tamizh,

The reported error is 'Error from server at http://localhost:8983/solr/documentum_manifoldcf_stg:
String index out of range: -188'.  The message seemingly indicates that the error was *received*
from the solr server for one specific document.  ManifoldCF does not recognize the error as
being innocuous and therefore it will retry for a while until it eventually gives up and halts
the job.  However, I cannot find that exact text anywhere in the Solr output connector code,
so I wonder if you transcribed it correctly?

There should also be the following:
(1) A record of the attempts in the manifoldcf.log file, with a MCF stack trace attached to
each one;
(2) Simple history records for that document that are of the type INGESTDOCUMENT.
(3) Solr log entries that have a Solr stack trace.

The last one is the one that would be the most helpful.  It is possible that you are seeing
a problem in Solr Cell (Tika) that is manifesting itself in this way.  You can (and should)
configure your Solr to ignore Tika errors.

Thanks,
Karl




On Tue, Jun 13, 2017 at 3:20 AM, Tamizh Kumaran Thamizharasan <tthamizharasan@worldbankgroup.org<mailto:tthamizharasan@worldbankgroup.org>>
wrote:
Hi,

The Manifoldcf 2.7.1 is running in the multiprocess zk model and integrated with PostgreSQL
9.3. The expected setup is to crawl the Documentum contents and pushed on to the output SOLR
5.3.2. The crawler-ui app is installed on the tomcat and startup script is pointed with the
MF properties.xml during server startup. Manifold along with the bundled ZK, tomcat are running
on the same host with OS as  Red Hat Enterprise Linux Server release 6.9 (Santiago). The DB
is running on a windows box.
The ZK is integrated with the DB through the properties.xml and properties-global.xml
The ZK, the documentum related processes(registry and server) are up and the  two agents (start-agents.sh
and start-agents-2.sh) are started  which produce multiple threads to index the documemtum
contents into SOLR through ManifoldCF.

The Current no of the connections configured on the MF are as below.
SOLR Output max connection : 25
Document repository  Max Connections: 25
Properties.xml:
<property name="org.apache.manifoldcf.database.maxhandles" value="50"/>
<property name="org.apache.manifoldcf.cr<http://org.apache.manifoldcf.cr>awler.threads"
value="25"/>
Total documentum document count : 0.5 million

After the Job is started, it indexed some 20000+ documents and gets terminated with the below
error on the Manifold JOB.
Error: Repeated service interruptions - failure processing document: Error from server at
http://localhost:8983/solr/documentum_manifoldcf_stg: String index out of range: -188

Please find the attached manifoldCF error log and agent log.

Please let me know the observations on the cause of the issue and the configuration on the
threads used  for crawling. Please share your thoughts.

Regards,
Tamizh Kumaran






Mime
View raw message