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Re: Connection pool problem jboss 5.1 + hibernate oracle 11.2.3.0 DB,Hibernate 3.3.2.GA
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created by <a href="https://community.jboss.org/people/wdfink">Wolf-Dieter Fink</a> in <i>Performance Tuning</i> - <a href="https://community.jboss.org/message/742138#742138">View the full discussion</a>
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<div class="jive-rendered-content"><p>The reason is logged as the cause:</p><p><span style="background-color: #ffffff; color: #000000; font-family: Arial, FreeSans, Helvetica, sans-serif; text-align: -webkit-auto;">     No ManagedConnections available within configured blocking timeout ( 50000 </span><span class="error" style="background-color: #ffffff; color: #000000; font-family: Arial, FreeSans, Helvetica, sans-serif; text-align: -webkit-auto;">[ms]</span><span style="background-color: #ffffff; color: #000000; font-family: Arial, FreeSans, Helvetica, sans-serif; text-align: -webkit-auto;"> )</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="background-color: #ffffff; color: #000000; font-family: Arial, FreeSans, Helvetica, sans-serif; text-align: -webkit-auto;">You have set  a maximum of 100 connections and a blocking timeout of 5000ms.</span></p><p><span style="background-color: #ffffff; color: #000000; font-family: Arial, FreeSans, Helvetica, sans-serif; text-align: -webkit-auto;">If you increase the nummer of parallel throughput the getConnection might wait for the next free one.</span></p><p><span style="background-color: #ffffff; color: #000000; font-family: Arial, FreeSans, Helvetica, sans-serif; text-align: -webkit-auto;">As the handling is not fair it might happen that one is waiting longer as others and hit the timeout.</span></p><p><span style="background-color: #ffffff; color: #000000; font-family: Arial, FreeSans, Helvetica, sans-serif; text-align: -webkit-auto;">Also if your transactions run for longer and block the connections.</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="background-color: #ffffff; color: #000000; font-family: Arial, FreeSans, Helvetica, sans-serif; text-align: -webkit-auto;">You might check this in the jmx.console, there are several counters for the connection pool.<br/></span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style="background-color: #ffffff; color: #000000; font-family: Arial, FreeSans, Helvetica, sans-serif; text-align: -webkit-auto;">In fact you have to increase the max-pool-size.</span></p></div>
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