[jboss-dev-forums] [Design of JBossCache] - org.jboss.cache.lock.TimeoutException in write / read intens

[inrusu]

Hi there,

  Trying my luck with JBossCache 1.4.1.SP1 on a Websphere 6.1.0.3 cluster with 2 nodes each node with 1 server. The OS on both machines is
  Windows XP Professional SP2.

  I'm using the  replSync-service.xml configuration file supplied in download ( etc\META-INF folder ). I've changed only the
  cache mode to INVALIDATION_SYNC because I need the sync happen sync and REPL_SYNC was too slow.

  I'm running some tests which do both cache read / write  I'm getting lots of org.jboss.cache.lock.TimeoutException
  when acquiring locks.

  The scenario in which the TimeOut occurs is the following :
  
  All the operations occur on a TreeCache with one node with one entry only in the node:
  
   in Node1 modify a node
    - the invalidation msg is snd
   
   in Node2 the WL is acquired by a user thread
    - the invalidation msg is rcv
    - the JGroups thread tries to put a WL  and fails with a time out which is send to Node1
    
  ..... and this keeps going on.


  What are the recomandations in this situations ( indeed this is an extrem  situations with some many updates on the same entry ):
  
  1. increase the timeout period ( the current one is zero )
  2. use optimistic locking ( how can I configure it ?)
  3. other ?
  
  Thanks
   Ionut RUSU

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