Unable to create a CoreContainer when embedding Solr in Jetty

Question

I followed the instructions on this post: http://javaskeleton.blogspot.de/2011/07/adding-solr-to-existing-web-application.html .

When I tried to execute this code:

File home = new File(System.getProperty("solr.solr.home"));
CoreContainer container = new CoreContainer(home.getPath());
container.load();
EmbeddedSolrServer server = new EmbeddedSolrServer(container, "collection1");

I encountered the following error:

org.apache.lucene.store.LockObtainFailedException: Lock obtain timed out: NativeFSLock@C:\\solr-4.6.0\\example\\solr\\collection1\\data\\index\\write.lock

Upon investigation, the error is issued while loading the CoreContainer. It attempts to lock a file in the index that is apparently locked.

Further investigation revealed that the SolrRequestFilter (the one that is initialized by Jetty) also instantiates a CoreContainer and my guess is that he is the offender. When I removed the SolrRequestFilter definition from web.xml, I was able to successfully instantiate the CoreContainer and the EmbeddedServer.

I am looking for insight as to how I can try to overcome the problem since it seems that it should be able to work.

Answer 1

You must find who lock this index.

Also there are several approaches that might help:

• Since you starting embedded Solr, you need to be sure, that Solr isn't running now (my bet is that 99% this is the cause of this issue)
• You could remove this lock file manually