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https://issues.apache.org/jira/browse/SOLR-7764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14620744#comment-14620744
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Sorin Gheorghiu commented on SOLR-7764:
---------------------------------------

Thank you Tim for your effort. As I said this morning, I don't think this issue 
is related to Tika, because the Tika error occurs as well when these files are 
removed and then Solr won't hung. The issue is still reproduceable and I 
noticed a bunch of solr errors like:

Jul 9, 2015 12:49:00 PM org.apache.catalina.loader.WebappClassLoader 
checkThreadLocalMapForLeaks
SEVERE: The web application [/solr] created a ThreadLocal with key of type 
[org.apache.xmlbeans.impl.store.Locale$1] (value [or                            
                                              
g.apache.xmlbeans.impl.store.Locale$1@39515054]) and a value of type 
[java.lang.ref.SoftReference] (value [java.lang.ref.SoftRe                      
                                                    ference@cb2f97d]) but 
failed to remove it when the web application was stopped. Threads are going to 
be renewed over time to tr                                                      
                    y and avoid a probable memory leak.
Jul 9, 2015 12:49:00 PM org.apache.catalina.loader.WebappClassLoader 
checkThreadLocalMapForLeaks
SEVERE: The web application [/solr] created a ThreadLocal with key of type 
[org.apache.solr.schema.DateField.ThreadLocalDateFor                            
                                              mat] (value 
[org.apache.solr.schema.DateField$ThreadLocalDateFormat@4f81bf75]) and a value 
of type [org.apache.solr.schema.Date                                            
                              Field.ISO8601CanonicalDateFormat] (value 
[org.apache.solr.schema.DateField$ISO8601CanonicalDateFormat@6b2ed43a]) but 
failed to                                                                       
    remove it when the web application was stopped. Threads are going to be 
renewed over time to try and avoid a probable memory le                         
                                                 ak.
Jul 9, 2015 12:49:00 PM org.apache.catalina.loader.WebappClassLoader 
checkThreadLocalMapForLeaks
SEVERE: The web application [/solr] created a ThreadLocal with key of type 
[org.apache.xmlbeans.impl.store.CharUtil$1] (value [                            
                                              
org.apache.xmlbeans.impl.store.CharUtil$1@4f40c31a]) and a value of type 
[java.lang.ref.SoftReference] (value [java.lang.ref.So                          
                                                ftReference@3a19840e]) but 
failed to remove it when the web application was stopped. Threads are going to 
be renewed over time                                                            
               to try and avoid a probable memory leak.

I can attach the whole log file by request.


> Solr indexing hangs if encounters an certain XML parse error
> ------------------------------------------------------------
>
>                 Key: SOLR-7764
>                 URL: https://issues.apache.org/jira/browse/SOLR-7764
>             Project: Solr
>          Issue Type: Bug
>          Components: query parsers
>    Affects Versions: 4.7.2
>         Environment: Ubuntu 12.04.5 LTS
>            Reporter: Sorin Gheorghiu
>              Labels: indexing
>         Attachments: Solr_XML_parse_error_080715.txt
>
>
> BlueSpice (http://bluespice.com/) uses Solr to index documents for the 
> 'Extended search' feature.
> Solr hangs if during indexing certain error occurs:
> 8.7.2015 15:34:26
> ERROR
> SolrCore
> org.apache.solr.common.SolrException: 
> org.apache.tika.exception.TikaException: XML parse error
> 8.7.2015 15:34:26
> ERROR
> SolrDispatchFilter
> null:org.apache.solr.common.SolrException: 
> org.apache.tika.exception.TikaException: XML parse error



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