I have issue with kanaka 2.7.0.52 where after a few days it dies.kanaka engine is running still but web access to console is broken and all clients stop functionong .It is not the out of memory issue that i see in the other posts ,/var/log/messages is clean the engine log is working then when it fails i see this
01 2012-09-18 10:36:21 -14400 8 8007 4847 7ffcca318700 NWXPLAT: m_pfnNWClearThreadSessionContext() failed, rc = 0x0000886f.
01 2012-09-18 10:36:22 -14400 8 8004 4847 7ffca0ff1700 HTTP: Unable to accept incoming connection from client address: 10.19.5.65. Connection gracefully closed by client.
01 2012-09-18 10:36:23 -14400 8 8007 4847 7ffca0ff1700 NWXPLAT: m_pfnNWClearThreadSessionContext() failed, rc = 0x0000886f.
01 2012-09-18 10:36:25 -14400 8 8007 4847 7ffca0ff1700 NWXPLAT: m_pfnNWClearThreadSessionContext() failed, rc = 0x0000886f.
01 2012-09-18 10:36:26 -14400 8 0001 4847 7ffcca318700 WD: Engine is running...
01 2012-09-18 10:36:26 -14400 8 8007 4847 7ffcca318700 NWXPLAT: m_pfnNWClearThreadSessionContext() failed, rc = 0x0000886f.
01 2012-09-18 10:36:27 -14400 8 8004 4847 7ffca3ff7700 HTTP: Unable to accept incoming connection from client address: 10.19.5.65. Connection gracefully closed by client.
01 2012-09-18 10:36:31 -14400 8 0001 4847 7ffcca318700 WD: Engine is running...

and it just repeats

restarting Kanaka engine does not fix or restarting tomcat or apache only reboot fixes temp