96 lines
6.0 KiB
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96 lines
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<meta name="DC.Title" content="Scenario: Use watch support with a job trace" />
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<meta name="abstract" content="You can use watch support with a job trace." />
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<title>Scenario: Use watch support with a job trace</title>
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<body id="watchjobtrcscen"><a name="watchjobtrcscen"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Scenario: Use watch support with a job trace</h1>
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<div><p>You can use watch support with a job trace.</p>
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<div class="section">Assume that you write a sockets server application
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that occasionally fails. When the application fails, the TCP3B04 socket API
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error is sent to the job log. <p>To solve the problem, you need to perform
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a job trace using watch support so that the trace is automatically stopped
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when the TCP3B04 error is sent to the job log. This allows you to capture
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only the data that you need to analyze the problem and prevents the trace
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from running longer than necessary.</p>
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<p>To perform the job trace using watch
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support, follow these steps:</p>
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</div>
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<ol><li><span>Start the job trace:</span><ol type="a"><li class="substepexpand"><span>At the command line, type <samp class="codeph">STRTRC</samp> and press
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F4.</span></li>
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<li class="substepexpand"><span>For the <em>Session ID</em> prompt, specify a meaningful session
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identifier, such as <em>mytrace</em>.</span></li>
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<li class="substepexpand"><span>For the <em>Jobs</em> parameter, specify these values:</span> <ul><li>For the <em>Jobs, Job Name</em> prompt, type the job name, such as <samp class="codeph">SOCKETAPP</samp>.</li>
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<li>For the <em>Jobs, User</em> prompt, specify the user ID, such as <em>user</em>.</li>
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<li>For the <em>Jobs, Number</em> prompt, type <samp class="codeph">*ALL</samp>.</li>
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</ul>
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</li>
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<li class="substepexpand"><span>For the <em>Watch for message, Message identifier</em> prompt,
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type <samp class="codeph">TCP3B04</samp>.</span></li>
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<li class="substepexpand"><span>For the <em>Watched message queue, Message queue</em> prompt,
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type <samp class="codeph">*JOBLOG</samp>. This ensures that the communications trace
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stops running when the TCP3B04 message is sent to the job log.</span></li>
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<li class="substepexpand"><span>For the <em>Watched job</em> parameter, specify these values:</span> <ul><li>For the <em>Jobs, Job Name</em> prompt, type <samp class="codeph">SOCKETAPP</samp>.</li>
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<li>For the <em>Jobs, User</em> prompt, specify the user ID, such as <em>user</em>.</li>
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<li>For the <em>Jobs, Number</em> prompt, type <samp class="codeph">*ALL</samp>.</li>
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</ul>
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</li>
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</ol>
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</li>
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<li><span>Verify that the watch support started:</span><ol type="a"><li class="substepexpand"><span>At the command line, type <samp class="codeph">DSPLOG</samp> and press
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F4.</span></li>
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<li class="substepexpand"><span>For the <em>Log</em> prompt, type <samp class="codeph">QHST</samp>.</span> You should see the following message: <p><samp class="codeph">Job <em>jobnumber</em>/<em>user</em>/QSCSTT<em>xxxx</em> started
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on mm/dd/yy at hh:mm:ss in subsystem QUSRWRK in QSYS. Job entered system on
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mm/dd/yy at hh:mm:ss</samp></p>
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where user is the name of the user that runs
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the STRTRC command and where xxxx indicates a unique identifier for the watch
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job. Note that STT in the middle of the job name indicates that the watch
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job was started by the STRTRC command.</li>
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</ol>
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</li>
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<li><span>Verify that the watch support is running:</span><ul><li>At the command line, type <samp class="codeph">WRKACTJOB SBS(QUSRWRK)</samp>.</li>
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<li>You should see the watch job running in the QUSRWRK subsystem. The
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job is usually in DEQW status if the watched message has not been sent.</li>
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</ul>
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</li>
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<li><span>After the TCP3B04 message is sent to the jobnumber/user/SOCKETAPP
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job log, you should verify that the trace has ended:</span><ul><li>At the command line, type <samp class="codeph">DSPMSG MSGQ(*SYSOPR)</samp>.</li>
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<li>You should see the CPI3999 message which indicates that the STRTRC
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command was ended because of reason code 02. Reason code 02 indicates that <samp class="codeph">Watch
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for event criteria met because of message id TCP3B04 found in <em>jobnumber</em>/<em>user</em>/SOCKETAPP</samp>.</li>
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</ul>
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</li>
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<li><span><a href="rzakuprtjobt.htm#prtjobt">Format the trace output</a> using
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the Print Trace (PRTTRC) command to analyze the data you collected.</span></li>
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</ol>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzakuwatchscenarios.htm" title="You can learn how to use the watch function when you perform a trace from these scenarios.">Scenarios: Use watch support with traces</a></div>
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