Done: http://issues.apache.org/jira/browse/LUCENE-1544
On Thu, Feb 19, 2009 at 12:54 PM, Michael McCandless < luc...@mikemccandless.com> wrote: > > Whoa -- please open a Jira issue? Since we still have 2.4/2.4.1/2.9 > allowing the deprecated autoCommit=true, we should fix it. > > Thanks Doug. > > Mike > > Doug Sale wrote: > > A deadlock issue occurs under the following circumstances >> - IndexWriter.autoCommit == true >> - IndexWriter.directory contains multiple segments >> - IndexWriter.AddIndex(IndexReader[]) is invoked >> >> I put together a JUnit test that recreates the deadlock, which I've >> attached. It is the first test method, 'testAddIndexByIndexReader()'. >> >> In a nutshell, here is what happens: >> >> // 1) AddIndexes(IndexReader[]) acquires the write lock, >> // then begins optimization of destination index (this is >> // prior to adding any external segments). >> // >> // 2) Main thread starts a ConcurrentMergeScheduler.MergeThread >> // to merge the 2 segments. >> // >> // 3) Merging thread tries to acquire the read lock at >> // IndexWriter.blockAddIndexes(boolean) in >> // IndexWriter.StartCommit(), but cannot as... >> // >> // 4) Main thread still holds the write lock, and is >> // waiting for the IndexWriter.runningMerges data structure >> // to be devoid of merges with their optimize flag >> // set (IndexWriter.optimizeMergesPending()). >> >> I hesitate to enter this as an issue in JIRA, as it is based on a >> deprecated constructor (autocommit == true). Additionally, I noted that >> 'IndexWriter.AddIndex(Directory[])' has been deprecated and wasn't sure of >> the fate of 'IndexWriter.AddIndex(IndexReader[])' in 3.0. >> >> - Doug Sale >> >> >> >> <TestAddIndexes.java>--------------------------------------------------------------------- >> To unsubscribe, e-mail: java-dev-unsubscr...@lucene.apache.org >> For additional commands, e-mail: java-dev-h...@lucene.apache.org >> > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-dev-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-dev-h...@lucene.apache.org > >