[ https://issues.apache.org/jira/browse/JCR-3194?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jukka Zitting updated JCR-3194: ------------------------------- Fix Version/s: 2.4 Merged to the 2.4 branch in revision 1232474. > ConcurrentModificationException in CacheManager. > ------------------------------------------------ > > Key: JCR-3194 > URL: https://issues.apache.org/jira/browse/JCR-3194 > Project: Jackrabbit Content Repository > Issue Type: Bug > Affects Versions: 2.3.4 > Reporter: Mat Lowery > Fix For: 2.4 > > > Using the test code below, I was able to produce this stack: > java.util.ConcurrentModificationException > at java.util.WeakHashMap$HashIterator.nextEntry(WeakHashMap.java:762) > at java.util.WeakHashMap$KeyIterator.next(WeakHashMap.java:795) > at > org.apache.jackrabbit.core.cache.CacheManager.logCacheStats(CacheManager.java:164) > at > org.apache.jackrabbit.core.cache.CacheManager.cacheAccessed(CacheManager.java:137) > at > org.apache.jackrabbit.core.cache.AbstractCache.recordCacheAccess(AbstractCache.java:122) > at > org.apache.jackrabbit.core.cache.ConcurrentCache.get(ConcurrentCache.java:122) > at > org.apache.jackrabbit.core.state.MLRUItemStateCache.retrieve(MLRUItemStateCache.java:71) > at > org.apache.jackrabbit.core.state.ItemStateReferenceCache.retrieve(ItemStateReferenceCache.java:139) > at > org.apache.jackrabbit.core.state.SharedItemStateManager.getNonVirtualItemState(SharedItemStateManager.java:1716) > at > org.apache.jackrabbit.core.state.SharedItemStateManager.getItemState(SharedItemStateManager.java:268) > at > org.apache.jackrabbit.core.state.LocalItemStateManager.getNodeState(LocalItemStateManager.java:110) > at > org.apache.jackrabbit.core.state.LocalItemStateManager.getItemState(LocalItemStateManager.java:175) > at > org.apache.jackrabbit.core.state.XAItemStateManager.getItemState(XAItemStateManager.java:260) > at > org.apache.jackrabbit.core.state.SessionItemStateManager.getItemState(SessionItemStateManager.java:161) > at > org.apache.jackrabbit.core.ItemManager.getItemData(ItemManager.java:382) > at org.apache.jackrabbit.core.ItemManager.getItem(ItemManager.java:328) > at org.apache.jackrabbit.core.ItemManager.getItem(ItemManager.java:622) > at > org.apache.jackrabbit.core.ItemManager.getRootNode(ItemManager.java:531) > at > org.apache.jackrabbit.core.SessionImpl.getRootNode(SessionImpl.java:760) > at test.JackrabbitTest$1.run(JackrabbitTest.java:37) > at > java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) > at java.lang.Thread.run(Thread.java:662) > ------------------------- > package test; > import java.io.File; > import java.util.concurrent.ExecutorService; > import java.util.concurrent.Executors; > import java.util.concurrent.TimeUnit; > import java.util.concurrent.atomic.AtomicBoolean; > import java.util.concurrent.atomic.AtomicInteger; > import javax.jcr.Repository; > import javax.jcr.RepositoryException; > import javax.jcr.Session; > import javax.jcr.SimpleCredentials; > import org.apache.jackrabbit.core.TransientRepository; > public class JackrabbitTest { > public static void main(final String[] args) throws Exception { > File dir = File.createTempFile("jackrabbit-test", ""); > dir.delete(); > dir.mkdir(); > System.out.println("created temporary directory: " + > dir.getAbsolutePath()); > dir.deleteOnExit(); > final Repository jcrRepo = new TransientRepository(dir); > final AtomicBoolean passed = new AtomicBoolean(true); > final AtomicInteger counter = new AtomicInteger(0); > ExecutorService executor = Executors.newFixedThreadPool(50); > Runnable runnable = new Runnable() { > @Override > public void run() { > try { > Session session = jcrRepo.login( > new SimpleCredentials("admin", > "admin".toCharArray())); > session.getRootNode().addNode("n" + > counter.getAndIncrement()); //unique name > session.save(); > session.logout(); > } catch (RepositoryException e) { > e.printStackTrace(); > passed.set(false); > } > } > }; > System.out.println("Running threads"); > for (int i = 0; i< 500; i++) { > executor.execute(runnable); > } > executor.shutdown(); //Disable new tasks from being submitted > if (!executor.awaitTermination(120, TimeUnit.SECONDS)) { > System.err.println("timeout"); > System.exit(1); > } > if (!passed.get()) { > System.err.println("one or more threads got an exception"); > System.exit(1); > } else { > System.out.println("all threads ran with no exceptions"); > System.exit(0); > } > } > } -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira