如何解决solr indexupgrader无法找到_md6.si？
我正在尝试将Solr 4.X索引升级到Solr 5.X（因此我可以将其一直升级到8.x）。 SOLR安装本身是版本4.5.1。
indexupgradertool抱怨说，它在我的索引中找不到文件_md6.si。它在我们的任何索引中都不存在，也没有有关Internet上文件的信息。我在所有索引文件中尝试了文本搜索，认为这可能是一种断开的链接，但我也无法那样找到它。
堆栈在下面。有人知道会出问题吗？
Exception in thread "main" java.nio.file.NoSuchFileException: C:\Temp\Dev_feature\default\index\_md6.si
at sun.nio.fs.WindowsException.translateToIOException(Unknown Source)
at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source)
at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source)
at sun.nio.fs.WindowsFileSystemProvider.newFileChannel(Unknown Source)
at java.nio.channels.FileChannel.open(Unknown Source)
at java.nio.channels.FileChannel.open(Unknown Source)
at org.apache.lucene.store.MMapDirectory.openInput(MMapDirectory.java:196)
at org.apache.lucene.codecs.lucene40.Lucene40SegmentInfoReader.read(Lucene40SegmentInfoReader.java:51)
at org.apache.lucene.index.SegmentInfos.read(SegmentInfos.java:361)
at org.apache.lucene.index.SegmentInfos$1.doBody(SegmentInfos.java:457)
at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:912)
at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:758)
at org.apache.lucene.index.SegmentInfos.read(SegmentInfos.java:453)
at org.apache.lucene.index.DirectoryReader.listCommits(DirectoryReader.java:277)
at org.apache.lucene.index.IndexUpgrader.upgrade(IndexUpgrader.java:151)
at org.apache.lucene.index.IndexUpgrader.main(IndexUpgrader.java:74)
I'm trying to upgrade a Solr 4.x index to Solr 5.x (so I can upgrade it all the way to 8.x). The Solr installation itself is version 4.5.1.
The IndexUpgraderTool complains that it can't find the file _md6.si in my index. It doesn't exist in any of our indexes, and there is no information about the file on the internet. I tried a text search inside all of the index files, thinking it might be a broken link of sorts, but I wasn't able to find it that way either.
The stacktrace is below. Does anyone have any idea what could be wrong?
Exception in thread "main" java.nio.file.NoSuchFileException: C:\Temp\Dev_feature\default\index\_md6.si
at sun.nio.fs.WindowsException.translateToIOException(Unknown Source)
at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source)
at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source)
at sun.nio.fs.WindowsFileSystemProvider.newFileChannel(Unknown Source)
at java.nio.channels.FileChannel.open(Unknown Source)
at java.nio.channels.FileChannel.open(Unknown Source)
at org.apache.lucene.store.MMapDirectory.openInput(MMapDirectory.java:196)
at org.apache.lucene.codecs.lucene40.Lucene40SegmentInfoReader.read(Lucene40SegmentInfoReader.java:51)
at org.apache.lucene.index.SegmentInfos.read(SegmentInfos.java:361)
at org.apache.lucene.index.SegmentInfos$1.doBody(SegmentInfos.java:457)
at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:912)
at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:758)
at org.apache.lucene.index.SegmentInfos.read(SegmentInfos.java:453)
at org.apache.lucene.index.DirectoryReader.listCommits(DirectoryReader.java:277)
at org.apache.lucene.index.IndexUpgrader.upgrade(IndexUpgrader.java:151)
at org.apache.lucene.index.IndexUpgrader.main(IndexUpgrader.java:74)
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在运行索引升级器之前，在索引上进行优化总是一个好主意 - 这样，您将获得索引升级器可以使用的干净索引。索引文件将被合并并重写为单个索引，并将删除任何遗留的删除文档等。
通常，您可以通过向更新处理程序发出
“优化命令”来调用优化：It's always a good idea to run optimize on the index before running index upgrader - that way you'll get a clean index that the index upgrader can work with. The index files will be merged and rewritten as a single index, and any lingering deleted documents, etc. will be removed.
You can generally call optimize by issuing an
optimizecommand to the update handler: