Comments on: [Solr] How To Fix java.io.IOException: directory FOO exists and is a directory, but cannot be listed: list() returned null

Comments on: [Solr] How To Fix java.io.IOException: directory FOO exists and is a directory, but cannot be listed: list() returned null http://beerpla.net/2009/09/21/solr-how-to-fix-java-io-ioexception-directory-foo-exists-and-is-a-directory-but-cannot-be-listed-list-returned-null/ where things have nothing to do with beer - tutorials, tips, how-tos, thoughts, hacks, and other techy nonsense Tue, 22 May 2012 20:57:44 +0000 hourly 1 http://wordpress.org/?v=3.3.2 By: jrephttp://beerpla.net/2009/09/21/solr-how-to-fix-java-io-ioexception-directory-foo-exists-and-is-a-directory-but-cannot-be-listed-list-returned-null/#comment-51635 jrep Fri, 27 May 2011 17:51:15 +0000 http://beerpla.net/2009/09/21/solr-how-to-fix-java-io-ioexception-directory-foo-exists-and-is-a-directory-but-cannot-be-listed-list-returned-null/#comment-51635 so, can you suggest any thumb rule for how often to optimize? so, can you suggest any thumb rule for how often to optimize?

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