WLS 6.1 sp3 and XA and DB2

Question

          Our configuration is:
          WLS 6.1 with sp3 on Solaris and DB2 7.2.7 on AIX running on remote server. Local
          DB2 client is installed on Solaris (LD_LIBRARY_PATH and other DB2 related variables
          are set accordingly).
          In some parts of our system we decided to use message-driven beans to process
          some work off side. In some of them we interact with database and send JMS messages
          to trigger some other MDBs. And we need all these operation to be one unit of
          work. Since we have operation on JMS and DB stores, we were forced to use XA and
          DB2 XA JDBC driver type 2.
          Most of the time things work fine ( always in our dev environment where WLS, DB2
          runs on the same Win2000 box), but rundomly we get JVM to crash on Solaris - like
          once a day or two. We are about to roll out to production but with these crashes
          we are confident about stablity of our app. We found that in most cases (but not
          all) those were related to the situation when DB2 connection were dropped or become
          invalid.
          On BEA website I found the information that WLS does not work in XA mode with
          DB2 7.1, because "APP driver falls back to NET driver". Does this still apply
          to DB2 7.2.7? If yes then I do not understand why Java->JNI call would fall back
          to Java->JNI->Java? Besides on IBM site there is nothing which says that type
          2 driver (so called APP one) requires JDBC client running on the same machine
          as database. If BEA claims that this indeed is the case, then it poses severe
          limitation to XA JDBC driver of IBM. Well, it means it is pretty much useless
          (who runs DB and app server on the same box ?)
          Today we just found new information about additional setting for XA connection
          pools that apply to DB2 and Sybase. For DB2 you need to set KeepXAConnTillTxComplete
          to true in your config.xml. We do not know yet if it is going to make things better
          (any input from BEA?)
          Can we get firm statement answer from BEA whether our configuration is supported
          or if not how we can achieve data/JMS integrity without using DB2 XA driver. Would
          using regular DB2 driver in pseudo-XA mode be a best work around, provided that
          the regular one is stable.
          How precisely WLS behave when it needs to orchestrate distributed transaction
          using pseudo-XA JDBC driver and fully-XA JMS server? In second phase does it first
          as DB to commit and if it succeeds it commits JMS, otherwise it rollbacks everything?
          We are very anxious to get our questions answered please.
          Thanks,
          Waldek
          

Answer 1

Look for sometime around November. No exact date.
Eric
"Dominic Tulley" <[email protected]> wrote in message
news:[email protected]..
Thanks Eric,
you know what I'm going to ask next right?
Any ideas when SP4 comes out?
Cheers,
-Dominic
"Eric Gross" <[email protected]> wrote in message
news:[email protected]..
The next version of Apache that we will support will be 2.0.42/2.0.43
and
the module for that will be included in the next Service Pack for6.1(SP4)
and 7.0(SP2).
The problem with Apache 2 is that when a new release comes out a newmodule
needs to be compiled. Most of the time. For 2.0.42/2.0.43 this is notthe
case.
Regards,
Eric
"Dominic Tulley" <[email protected]> wrote in
message
news:3da3f246$[email protected]..
I'm trying to set this up (initially just apache in front of a single
WLS
server but ultimately I want to put it in front of a cluster).
I've installed Apache 2.0.40.
I've copied the mod_wl_20.so file into the apache modules folder.
I've edited the httpd.conf file and added the line:
LoadModule weblogic_module modules/mod_wl_20.so
When I run apache -t to check the configuration I get the following:
C:\Program Files\Apache Group\Apache2\bin>apache -t
Syntax error on line 173 of C:/Program Files/Apache
Group/Apache2/conf/httpd.conf:
Cannot load C:/Program Files/Apache Group/Apache2/modules/mod_wl_20.sointo
server: The specified procedure could not be found.
So what's going on here?
Looking at previous postings it sounds like there's an issue with
versions
of apache after 2.0.39 but I can't find a download for that version.Also,
it sounded like the issues were for WLS 7, not 6.1. Can this work
with
2.0.40 or am I wasting my time?
If I get the mod_wl_20.so from dev2dev I get the "incompatible plugin"
message that has been mentioned in this group already.
Any suggestions appreciated,
-Dominic