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From "James Dyer (Resolved) (JIRA)" <>
Subject [jira] [Resolved] (SOLR-1867) CachedSQLentity processor is using unbounded hashmap
Date Tue, 17 Apr 2012 15:56:17 GMT


James Dyer resolved SOLR-1867.

    Resolution: Won't Fix

SOLR-2382 allowed for plugable cache implementations (3.6 & 4.x).  There are 2 (uncommitted
thus far) cache implementations that store the cache on-disk (See SOLR-2613 and SOLR-2948).

Finally, if the memory leak described was due to ThreadLocal usage, this was eliminated in
4.0 with the removal of the "threads" feature.
> CachedSQLentity processor is using unbounded hashmap 
> -----------------------------------------------------
>                 Key: SOLR-1867
>                 URL:
>             Project: Solr
>          Issue Type: Bug
>          Components: contrib - DataImportHandler
>    Affects Versions: 1.4
>            Reporter: barani
> I am using cachedSqlEntityprocessor in DIH to index the data. Please find a sample dataconfig
> <entity x query="select * from x"> ---> object 
> <entity y query="select * from y" processor="cachedSqlEntityprocessor"> --> object properties 
> For each and every object I would be retrieveing corresponding object properties (in
my subqueries). 
> I get in to OOM very often and I think thats a trade off if I use cachedSqlEntityprocessor.

> My assumption is that when I use cachedSqlEntityprocessor the indexing happens as follows,

> First entity x will get executed and the entire table gets stored in cache 
> next entity y gets executed and entire table gets stored in cache 
> Finally the compasion heppens through hash map . 
> So always I need to have the memory allocated to SOLR JVM more than or equal to the data
present in tables.
> One more issue is that even after SOLR completes indexing, the memory used previously
is not getting released. I could still see the JVM consuming 1.5 GB after the indexing completes.
I tried to use Java hotspot options but didnt see any differences.. GC is not getting invoked
even after a long time when using CachedSQLentity processor
> Main issue seem to be the fact that  the CachedSQLentity processor cache is an unbounded
HashMap, with no option to bound it. 
> Reference:

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