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From Zisis Tachtsidis <zist...@runbox.com>
Subject Index directory containing only segments.gen
Date Thu, 12 Feb 2015 16:30:04 GMT
I'm using SolrCloud 4.10.3 and the current setup is simple using 3 nodes with
1 shard. After a rolling restart of the Solr cluster I've ended up with 2
failing nodes reporting the following

org.apache.solr.servlet.SolrDispatchFilter
null:org.apache.solr.common.SolrException: SolrCore 'core' is not available
due to init failure: Error opening new searcher
Caused by: org.apache.solr.common.SolrException: Error opening new searcher
        at org.apache.solr.core.SolrCore.openNewSearcher(SolrCore.java:1574)
        at org.apache.solr.core.SolrCore.getSearcher(SolrCore.java:1686)
        at org.apache.solr.core.SolrCore.<init>(SolrCore.java:853)
        ... 8 more
Caused by: java.nio.file.NoSuchFileException: /path/to/index/segments_1
        at
sun.nio.fs.UnixException.translateToIOException(UnixException.java:86)
        at
sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102)
        at
sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107)
        at
sun.nio.fs.UnixFileSystemProvider.newFileChannel(UnixFileSystemProvider.java:177)
        at java.nio.channels.FileChannel.open(FileChannel.java:287)
        at java.nio.channels.FileChannel.open(FileChannel.java:334)
        at
org.apache.lucene.store.MMapDirectory.openInput(MMapDirectory.java:196)
        at
org.apache.lucene.store.Directory.openChecksumInput(Directory.java:113)
        at org.apache.lucene.index.SegmentInfos.read(SegmentInfos.java:341)
        at
org.apache.lucene.index.SegmentInfos$1.doBody(SegmentInfos.java:454)
        at
org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:906)
        at
org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:752)
        at org.apache.lucene.index.SegmentInfos.read(SegmentInfos.java:450)
        at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:792)
        at
org.apache.solr.update.SolrIndexWriter.<init>(SolrIndexWriter.java:77)
        at
org.apache.solr.update.SolrIndexWriter.create(SolrIndexWriter.java:64)
        at
org.apache.solr.update.DefaultSolrCoreState.createMainIndexWriter(DefaultSolrCoreState.java:279)
        at
org.apache.solr.update.DefaultSolrCoreState.getIndexWriter(DefaultSolrCoreState.java:111)
        at org.apache.solr.core.SolrCore.openNewSearcher(SolrCore.java:1537)
        ... 10 more

Checking the index directory of each node I found out that only
*segments.gen* was inside. What I could not determine is how I ended up with
this single file. Looking at the logs I could not find anything related. The
3rd node had its index intact.
Has anyone else encountered something similar?



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