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Tuxedo - on Solaris 8: signal delivery issue may affect networked components (Doc ID 774110.1)

Last updated on MAY 10, 2021

Applies to:

Oracle Tuxedo - Version 8.1 and later
Information in this document applies to any platform.
Information in this document applies to any platform
***Checked for relevance on 24-01-2011***


On Solaris 2.8 (as well as 2.7), a bug in the Kernel may cause delays in some processes because a network signal may not be delivered.

The networked components in Tuxedo (/WS, /Domains, BRIDGE, Jolt) are designed in a highly asynchronous mode to enhance performance, 
and rely on the fact that the OS delivers a SIGIO or SIGPOLL signal to the corresponding process (WSH, GWTDOMAIN, BRIDGE or JSH)
whenever a network event happens: typically a request message coming in from a client process. On Solaris 2.8, however, a kernel bug will sometimes cause those networked components not to receive the network signal, possibly leading to a delay.
This is mostly apparent with the WSH or JSH processes, that would simply sleep on msgrcv() system call for as long as SCANUNIT * SANITYSCAN all the while messages
are coming in from the network side (as seen with truss and snoop traces).


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