[ https://issues.jboss.org/browse/ISPN-4497?page=com.atlassian.jira.plugin.... ] Anuj Shah commented on ISPN-4497: --------------------------------- I have a 'test' of sorts to demonstrate the problem: {code:java} @Test public void testMultiThreaded() throws InterruptedException { EmbeddedCacheManager cacheManager = new DefaultCacheManager(); Cache<Object, Object> metadata = cacheManager.getCache("metadata"); Cache<Object, Object> chunks = cacheManager.getCache("chunks"); Cache<Object, Integer> locks = cacheManager.getCache("locks"); metadata.put(new FileCacheKey("indexName", "fileName"), new FileMetadata(10)); int numThreads = 10; final LocalLockMergingSegmentReadLocker llmsrl = new LocalLockMergingSegmentReadLocker(locks, chunks, metadata, "indexName"); for (int i = 0; i < numThreads; i++) { Thread thread = new Thread(new Runnable() { int counter = 0; @Override public void run() { try { while (true) { llmsrl.acquireReadLock("fileName"); Thread.sleep(10); llmsrl.deleteOrReleaseReadLock("fileName"); // Take a break every now and a again to try and avoid the same LocalReadLock being used constantly if (counter++ % 10 == 0) { Thread.sleep(100); } } } catch (InterruptedException e) { } } }); thread.setDaemon(true); thread.start(); } // Keep checking every 100ms. The file should never be deleted. while (true) { Thread.sleep(100); assertNotNull(metadata.get(new FileCacheKey("indexName", "fileName"))); } } {code} For me this fails in around 8min -- This message was sent by Atlassian JIRA (v6.2.6#6264)