Mike Drob created SOLR-8304:
-------------------------------
Summary: SolrIndexWriter can throw NPE during finalize if create
fails
Key: SOLR-8304
URL: https://issues.apache.org/jira/browse/SOLR-8304
Project: Solr
Issue Type: Bug
Affects Versions: 5.3, 4.10.3
Reporter: Mike Drob
Fix For: Trunk
When {{SolrIndexWriter.create()}} fails (likely to some IOException), then the
finalizer can still be called on the partially constructed object
([ref|http://stackoverflow.com/questions/14483279/can-finalize-be-called-after-a-constructor-throws-an-exception]).
This will lead to trying to close an index that is not fully initialized, and
give us some not so desirable behaviour. From a 4.10.3 insance:
{noformat}
2015-11-12 15:55:16,295 ERROR org.apache.solr.update.SolrIndexWriter: Error
closing IndexWriter
java.lang.NullPointerException
at org.apache.lucene.index.IndexWriter.doFlush(IndexWriter.java:3237)
at org.apache.lucene.index.IndexWriter.flush(IndexWriter.java:3210)
at org.apache.lucene.index.IndexWriter.shutdown(IndexWriter.java:907)
at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:984)
at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:954)
at
org.apache.solr.update.SolrIndexWriter.close(SolrIndexWriter.java:129)
at
org.apache.solr.update.SolrIndexWriter.finalize(SolrIndexWriter.java:182)
at java.lang.System$2.invokeFinalize(System.java:1270)
at java.lang.ref.Finalizer.runFinalizer(Finalizer.java:98)
at java.lang.ref.Finalizer.access$100(Finalizer.java:34)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:210)
{noformat}
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