Pablo Lozano created SOLR-7843:
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Summary: Importing Deltal create a memory leak
Key: SOLR-7843
URL: https://issues.apache.org/jira/browse/SOLR-7843
Project: Solr
Issue Type: Bug
Components: contrib - DataImportHandler
Affects Versions: 5.2.1
Reporter: Pablo Lozano
The org.apache.solr.handler.dataimport.SolrWriter is not correctly cleaning
itself after finishing importing Deltas as the "Set<Object> deltaKeys" is not
being cleaned after the process has finished.
When using a custom importer or DataSource for my case I need to add additional
parameters to the delta keys.
When the data import finishes the DeltaKeys is not set back to null and the
DataImporter, DocBuilder and the SolrWriter are mantained as live objects
because there are being referenced by the "infoRegistry" of the SolrCore which
seems to be used for Jmx information.
It appears that starting a second delta import did not freed the memory which
may cause on the long run an OutOfMemory, I have not checked if starting a full
import would break the references and free the memory.
An easy fix is possible which would be to add to the SolrWriter "deltaKeys =
null;" on the close method.
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