[jboss-user] [JBossCache] - Concurrency issue in OrderedSynchronizationHandler (2.0.0GA

Hi, Two issues/questions regarding OrderedSynchronizationHandler. 1) The "instances" member is not synchronized OrderedSynchronizationHandler seems to have an unguarded static HashMap member called "instances". This is a potentional crash issue. On one of our instances (in a four member cluster) with medium high load (aprox 1500 transaction per second), the CPU flat-lined on 200% with 21 threads caught and spinning in HashMap.get(Object) as called from OrderedSynchronizationHandler.getInstance(Transaction). I'll copy a typical stack trace below. 2) The "instances" member is static This is more of a question. If several caches are run within the same VM/ClassLoader they will all share the "instances" member. This seems fairly inefficient, especially if the map in question needs to be synchronized as per #1. Below is a typical, slightly trunctated, stack trace for issue #1. "Incoming Thread,TableSpace,172.16.0.2:8786" daemon prio=1 tid=0x097e9208 nid=0x14de runnable [0x83228000..0x83229030] | at java.util.HashMap.get(HashMap.java:346) | at org.jboss.cache.interceptors.OrderedSynchronizationHandler.getInstance(OrderedSynchronizationHandler.java:50) | at org.jboss.cache.interceptors.TxInterceptor.registerHandler(TxInterceptor.java:901) | at org.jboss.cache.interceptors.TxInterceptor.handleRemotePrepare(TxInterceptor.java:246) | at org.jboss.cache.interceptors.TxInterceptor.invoke(TxInterceptor.java:100) | at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:76) | at org.jboss.cache.interceptors.CacheMgmtInterceptor.invoke(CacheMgmtInterceptor.java:123) | at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:76) | at org.jboss.cache.interceptors.InvocationContextInterceptor.invoke(InvocationContextInterceptor.java:62) | at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:76) | at com.cubeia.space.cache.HaltableInterceptor.invoke(HaltableInterceptor.java:32) | at org.jboss.cache.CacheImpl.invokeMethod(CacheImpl.java:3939) | at org.jboss.cache.CacheImpl._replicate(CacheImpl.java:2853) | What say you? /Lars J. Nilsson Cubeia Ltd, UK Fillial View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4129420#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...