Hello, I posted this question on the java-lucene group but not sure if my email was noticed/made it through. Hence posting here. Apologies if this is against the guidelines/best practices.
I am running Solr on a Windows server and mmap doesn't quite work well there, so I have been using SimpleFS. It was working well for the most part, but we recently encountered ClosedChannelException due to the file descriptor getting closed during IO. >From the java doc of SimpleFSDirectory... https://lucene.apache.org/core/7_7_2/core/org/apache/lucene/store/SimpleFSDirectory.html *NOTE:* Accessing this class either directly or indirectly from a thread while it's interrupted can close the underlying file descriptor immediately if at the same time the thread is blocked on IO. The file descriptor will remain closed and subsequent access to SimpleFSDirectory <https://lucene.apache.org/core/7_7_2/core/org/apache/lucene/store/SimpleFSDirectory.html> will throw a ClosedChannelException <https://docs.oracle.com/javase/8/docs/api/java/nio/channels/ClosedChannelException.html?is-external=true>. If your application uses either Thread.interrupt() <https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html?is-external=true#interrupt--> or Future.cancel(boolean) <https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html?is-external=true#cancel-boolean-> you should use the legacy RAFDirectory from the Lucene misc module in favor of SimpleFSDirectory <https://lucene.apache.org/core/7_7_2/core/org/apache/lucene/store/SimpleFSDirectory.html> . We eventually found the culprit interrupting call, but it led me to thinking if RAFDirectory is in general a worthy replacement for SimpleFS. Are there any downsides to RAFDirectory (vs SimpleFS) due to which it is considered legacy? Thanks., Rahul
