So the indexWriterConfig.clone() failed at this step: clone.indexerThreadPool = indexerThreadPool <http://grepcode.com/file/repo1.maven.org/maven2/org.apache.lucene/lucene-core/4.7.0/org/apache/lucene/index/LiveIndexWriterConfig.java#LiveIndexWriterConfig.0indexerThreadPool> .clone <http://grepcode.com/file/repo1.maven.org/maven2/org.apache.lucene/lucene-core/4.7.0/org/apache/lucene/index/DocumentsWriterPerThreadPool.java#DocumentsWriterPerThreadPool.clone%28%29> ();
which then failed at this step in the "indexerThreadPool" if (numThreadStatesActive <http://grepcode.com/file/repo1.maven.org/maven2/org.apache.lucene/lucene-core/4.7.0/org/apache/lucene/index/DocumentsWriterPerThreadPool.java#DocumentsWriterPerThreadPool.0numThreadStatesActive> != 0) { throw new IllegalStateException <http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/6-b27/java/lang/IllegalStateException.java#IllegalStateException>("clone this object before it is used!"); } There is a comment right above this: // We should only be cloned before being used: Does this mean whenever the indexWriter gets called for commit/prepareCommit, etc., the corresponding indexWriterConfig object cannot be called with .clone() at all? On Mon, Aug 11, 2014 at 9:52 PM, Vitaly Funstein <vfunst...@gmail.com> wrote: > Looks like you have to clone it prior to using with any IndexWriter > instances. > > > On Mon, Aug 11, 2014 at 2:49 PM, Sheng <sheng...@gmail.com> wrote: > > > I tried to create a clone of indexwriteconfig with > > "indexWriterConfig.clone()" for re-creating a new indexwriter, but I > then I > > got this very annoying illegalstateexception: "clone this object before > it > > is used". Why does this exception happen, and how can I get around it? > > Thanks! > > >
