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Multithreading issue on Solaris 8 branded zone

807559Sep 14 2009
Hi,

We are facing a multithreading problem in Solaris 8 container (branded zone) on Solaris 10.

The core file shows 2 LWPs for a single thread.

First LWP
---------------
(dbx) lwp
current LWP ($lwp) is l@1403
(dbx) print this->m_ThreadId->m_IdImpl.m_PosixId
this->m_ThreadId.m_IdImpl.m_PosixId = 1404U

Second LWP
-------------------
(dbx) lwp
current LWP ($lwp) is l@1404
(dbx) print this->m_ThreadId->m_IdImpl.m_PosixId
this->m_ThreadId.m_IdImpl.m_PosixId = 1404U

Another point to note is that dbx returns 'MT support is disabled' for this program even though it has been built using the -mt option. The dbx version is Sun Dbx Debugger 7.5 2005/10/13.

As far as I have read, the Solaris 8 branded zone uses the alternate T2 thread library. Note also that this program is linked with the alternate thread library @ /usr/lib/lwp.

This alternate thread library is supposed to use the 1:1 thread model.
Can someone explain why are we then seeing 2 LWPs for a single thread ?

Thanks,
Best regards,
Raj Iyer

Comments

Gyanprakash Pandey
Refer doc below:
http://docs.oracle.com/cd/E21764_01/doc.1111/e15478/webgate.htm#BABHCBGG

regards,
GP
user13714831
Hi - Did you get answer to your question? if yes - could you pls share?

Even we are using Apache 2.2.x and OAM 11.1.1.5. I wanted to know if OAM 11g Webgate is available/supported for Apache 2.2.x? As per OAM 11g webgate certification matrix it supports "Oracle HTTP Server 11gR1 (11.1.1.2+) based on Apache 2.2.x" but not sure if Apache 2.2 is certified and supported by 11g agents?
User_BR1OQ
Hi,

As of now Webgate 11g is not supported with Apache 2.2 or any other Apache version. There is a big architecture difference in OHS11g and Apache 2.2, even though OHS11g is based on Apache2.2.

If you need a webgate for Apache2.2 then you should be using 10g webgates.

~Yagnesh
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Locked on Oct 12 2009
Added on Sep 14 2009
#oracle-solaris, #solaris-zones
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