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Subject: [jboss-user] [jBPM] - Re: JTA Problem with multiple sessions
From: vchmakov <do-not-reply () jboss ! com>
Date: 2013-01-31 21:17:11
Message-ID: 2-795428-3-119803-1359649540683-2-795511-3-79954-1359667024792.jivesbs.jivemailuser () https://community ! jboss ! org
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vchmakov [https://community.jboss.org/people/vchmakov] created the discussion
"Re: JTA Problem with multiple sessions"
To view the discussion, visit: https://community.jboss.org/message/795511#795511
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Hi Maciej,
Please consider the following scenario. There are two sessions in an environment to \
execute requests in parallel – S1 and S2. Task Service is local – which is \
important for this discussion. 1. ) User A (UA) requesting to start a process which \
produces a Human Task. Thread 1 (T1) jumping up, picking up S1, executing the \
workflow and producing a Human Task (HT1). 2. ) User B (UB) requesting to execute \
something. Thread 1 (T1) jumping up, picking up S1 and starting doing something. 3. ) \
At the same time user C (UC) completing the HT1. T2 jumping up and seeing that HT1 \
belongs to S1. OK, the handler is picking up S1, executing the completeTask() command \
and resuming the workflow on S1. Here comes the conflict, because S1 is busy doing \
things on T1.
According to your description above it seems like there is no workaround, because if \
we'd set OwingSession to FALSE both S1 and S2 would receive notification. Correct? If \
this is correct then what session would be used for completing task in this case? I \
believe regardless of the answer the conflict is inevitable. Correct?
Thanks,
Vladimir
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17px; font-weight: normal;"> Re: JTA Problem with multiple sessions
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<span style="margin-bottom: 10px;">
created by <a href="https://community.jboss.org/people/vchmakov">vchmakov</a> in \
<i>jBPM</i> - <a href="https://community.jboss.org/message/795511#795511">View the \
full discussion</a> </span>
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<div class="jive-rendered-content"><p>Hi Maciej,</p><p style="min-height: 8pt; \
height: 8pt; padding: 0px;"> </p><p>Please consider the following scenario. \
There are two sessions in an environment to execute requests in parallel – S1 \
and S2. Task Service is local – which is important for this discussion.</p><ol \
style="list-style-type: decimal;"><li>) User A (UA) requesting to start a process \
which produces a Human Task. Thread 1 (T1) jumping up, picking up S1, executing the \
workflow and producing a Human Task (HT1).</li><li>) User B (UB) requesting to \
execute something. Thread 1 (T1) jumping up, picking up S1 and starting doing \
something.</li><li>) At the same time user C (UC) completing the HT1. T2 jumping up \
and seeing that HT1 belongs to S1. OK, the handler is picking up S1, executing the \
completeTask() command and resuming the workflow on S1. Here comes the conflict, \
because S1 is busy doing things on T1.</li></ol><p style="min-height: 8pt; height: \
8pt; padding: 0px;"> </p><p>According to your description above it seems like \
there is no workaround, because if we’d set OwingSession to FALSE both S1 and \
S2 would receive notification. Correct? If this is correct then what session would be \
used for completing task in this case? I believe regardless of the answer the \
conflict is inevitable. Correct?</p><p style="min-height: 8pt; height: 8pt; padding: \
0px;"> </p><p>Thanks,</p><p style="min-height: 8pt; height: 8pt; padding: \
0px;"> </p><p>Vladimir</p></div>
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<p style="margin: 0;">Reply to this message by <a \
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