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https://issues.apache.org/jira/browse/NIFI-8210?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Mark Payne updated NIFI-8210:
-----------------------------
Description:
When all events have been aged off from a Provenance Lucene Index, the lucene
index can be deleted. However, before deleting it, the repository needs to
ensure that there are no active readers or writers. Currently, the repository
only ensures that there are no active writers. As a result, we can have an
active Index Reader/Index Searcher and still delete the index directory. When
this happens, we end up with an error similar to:
{code:java}
org.apache.lucene.index.IndexNotFoundException: no segments* file found in
MMapDirectory@/Users/mpayne/devel/nifi/nifi-nar-bundles/nifi-provenance-repository-bundle/nifi-persistent-provenance-repository/target/6e442c6d-14f3-48bb-9500-534c136942aa
lockFactory=org.apache.lucene.store.NativeFSLockFactory@161b062a: files: []
at
org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:675)
at
org.apache.lucene.index.StandardDirectoryReader.open(StandardDirectoryReader.java:81)
at org.apache.lucene.index.DirectoryReader.open(DirectoryReader.java:63)
at
org.apache.nifi.provenance.lucene.StandardIndexManager.borrowIndexSearcher(StandardIndexManager.java:128)
...{code}
We need to ensure that we account for any Readers/Searchers that are active also
was:
When all events have been aged off from a Provenance Lucene Index, the lucene
index can be deleted. However, before deleting it, the repository needs to
ensure that there are no active readers or writers. Currently, the repository
only ensures that there are no active writers. As a result, we can have an
active Index Reader/Index Searcher and still delete the index directory. When
this happens, we end up with an error similar to:
{code:java}
org.apache.lucene.index.IndexNotFoundException: no segments* file found in
MMapDirectory@/Users/mpayne/devel/nifi/nifi-nar-bundles/nifi-provenance-repository-bundle/nifi-persistent-provenance-repository/target/6e442c6d-14f3-48bb-9500-534c136942aa
lockFactory=org.apache.lucene.store.NativeFSLockFactory@161b062a: files:
[]org.apache.lucene.index.IndexNotFoundException: no segments* file found in
MMapDirectory@/Users/mpayne/devel/nifi/nifi-nar-bundles/nifi-provenance-repository-bundle/nifi-persistent-provenance-repository/target/6e442c6d-14f3-48bb-9500-534c136942aa
lockFactory=org.apache.lucene.store.NativeFSLockFactory@161b062a: files: []
at
org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:675)
at
org.apache.lucene.index.StandardDirectoryReader.open(StandardDirectoryReader.java:81)
at org.apache.lucene.index.DirectoryReader.open(DirectoryReader.java:63) at
org.apache.nifi.provenance.lucene.StandardIndexManager.borrowIndexSearcher(StandardIndexManager.java:128)
{code}
We need to ensure that we account for any Readers/Searchers that are active also
> If Provenance Repository ages off a Lucene Index while it's being searched,
> can lead to index corruption
> --------------------------------------------------------------------------------------------------------
>
> Key: NIFI-8210
> URL: https://issues.apache.org/jira/browse/NIFI-8210
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Reporter: Mark Payne
> Assignee: Mark Payne
> Priority: Major
>
> When all events have been aged off from a Provenance Lucene Index, the lucene
> index can be deleted. However, before deleting it, the repository needs to
> ensure that there are no active readers or writers. Currently, the repository
> only ensures that there are no active writers. As a result, we can have an
> active Index Reader/Index Searcher and still delete the index directory. When
> this happens, we end up with an error similar to:
> {code:java}
> org.apache.lucene.index.IndexNotFoundException: no segments* file found in
> MMapDirectory@/Users/mpayne/devel/nifi/nifi-nar-bundles/nifi-provenance-repository-bundle/nifi-persistent-provenance-repository/target/6e442c6d-14f3-48bb-9500-534c136942aa
> lockFactory=org.apache.lucene.store.NativeFSLockFactory@161b062a: files: []
> at
> org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:675)
> at
> org.apache.lucene.index.StandardDirectoryReader.open(StandardDirectoryReader.java:81)
> at org.apache.lucene.index.DirectoryReader.open(DirectoryReader.java:63)
> at
> org.apache.nifi.provenance.lucene.StandardIndexManager.borrowIndexSearcher(StandardIndexManager.java:128)
> ...{code}
> We need to ensure that we account for any Readers/Searchers that are active
> also
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