oracle Bug 8833280

Applies to:

Oracle Server - Standard Edition - Version: 10.2.0.4 and later<wbr><wbr> [Release: 10.2 and later ]<br> Information in this document applies to any platform.<br> Symptoms<br><br><br> === ODM Issue Clarification ===<br><br> Database goes in hang mode. Not able to make any new connections and not able to perform any<br> operations on existing connections. It happens frequently.<br><br> The alert.log shows enteries like:-<br> Thu Oct 7 22:15:14 2010<br> ksvcreate: Process(m001) creation failed<br> Thu Oct 7 22:17:37 2010<br> kkjcre1p: unable to spawn jobq slave process<br> Thu Oct 7 22:17:37 2010<br> Errors in file /orahome/oracle/ora10g/admin/WPCPRODB/bdump/wpcprodb_cjq0_1474640.trc:<br> Cause<br><br> The alert.log messages are not the cause , but result .PMON is needed to create new processes and since PMON itself is hung , no new processes can be started.<br><br> This is verified form Systemstate dump:-<br><br> --<br><br> OSD pid info: Unix process pid: 1519850, image: oracle@wpcdbqa (PMON)<br><br> errorstack<br> kksLockWait+01fc&lt;-kgxWait+0168&lt;-kgxExclusive+00bc&lt;-kksFreeHeapGetMutex+0228&lt;-kksCursorFreeCallBack+0088&lt;-kgllccl+13cc&lt;-kgllcu+01b4<br><br><br> waiting for 'cursor: pin X' blocking sess=0x0 seq=8166 wait_time=0 seconds since wait started=0<br><wbr><wbr><wbr><wbr> idn=6e0a6074, value=20600000000, where|sleeps=b003c1e3a<br> Dumping Session Wait History<br><br> The holder of the mutex does not exist ( dead process)<br> Solution<br><br> This is due to a known bug<br><br> &lt;&lt; Bug 8426816&gt;&gt; PMON may hang cleaning up a dead process (rare)<br><br> Details:<br> This problem is introduced in 10.2.0.4 by the fix for bug 5377099.<br> Under a very specific scenario involving process death at a precise<br> point in time, an instance hang may result due to PMON getting<br> blocked when attempting to clean up a failed process.<br> Rediscovery Notes:<br> PMON gets stuck during cleanup waiting for a mutex in X mode<br> and that mutex is held in X mode by the dead process being<br> cleaned up . PMON is blocked under a stack including<br> kksFreeHeapGetMutex()<br> Note:<br> One off patches for this bug also fix issue in bug 5377099 .<br><br><br><br> Action Plan:-<br><br> 1)Please apply this patch to fix the issue.<br> or<br> 2)The patch is also included in 10.2.0.4.2 PSU patch .<br> ( which fixes other known issues of 10.2.0.4.0)<br><br> You may refer to note: 8833280.8<br><br> 安徽-惜分飞&lt;[email protected]&gt;<wbr> 12:26:20<br> [ID 1233079.1<br> 安徽-惜分飞&lt;[email protected]&gt;<wbr> 12:26:49<br> Bug 8833280<br><br></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>