Java deadlock when insert in t1 and find in t2 when using IBM JVM 1.5.0 -----------------------------------------------------------------------
Key: OPENJPA-98 URL: https://issues.apache.org/jira/browse/OPENJPA-98 Project: OpenJPA Issue Type: Bug Environment: OpenJPA: 0.9.6 Java: java version "1.5.0" Java(TM) 2 Runtime Environment, Standard Edition (build pwi32dev-20061002a (SR3) ) IBM J9 VM (build 2.3, J2RE 1.5.0 IBM J9 2.3 Windows XP x86-32 j9vmwi3223-2006100 1 (JIT enabled) J9VM - 20060915_08260_lHdSMR JIT - 20060908_1811_r8 GC - 20060906_AA) JCL - 20061002 DB: Derby 10.2.1.6 Reporter: Vlad Tatavu I have a simple test program that uses OpenJPA 0.9.6 to insert an object into a db in one transaction (t1) and retrieve it in another transaction (t2). The program hangs in 30-50% of the executions right before the call to entitymanager.find() (used to retrieve the object in t2). I'm using OpenJPA runtime enhancement. By looking at the JVM dump, I can see the following deadlock: 1LKDEADLOCK Deadlock detected !!! NULL --------------------- NULL 2LKDEADLOCKTHR Thread "main" (0x0015EC00) 3LKDEADLOCKWTR is waiting for: 4LKDEADLOCKMON sys_mon_t:0x41E40548 infl_mon_t: 0x41E40588: 4LKDEADLOCKOBJ java/lang/[EMAIL PROTECTED]/00D4101C: 3LKDEADLOCKOWN which is owned by: 2LKDEADLOCKTHR Thread "Finalizer thread" (0x41B36200) 3LKDEADLOCKWTR which is waiting for: 4LKDEADLOCKMON sys_mon_t:0x0035CD38 infl_mon_t: 0x0035CD78: 4LKDEADLOCKOBJ sun/misc/[EMAIL PROTECTED]/00D4E5BC: 3LKDEADLOCKOWN which is owned by: 2LKDEADLOCKTHR Thread "main" (0x0015EC00) -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira