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POC3P0 Connection Problem
 

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  1. POC3P0 Connection Problem
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    <p>I am using hibernate and cp30 for database operations and getting error:</p> <pre><code>com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection </code></pre> <p>Here are my jdbc properties:</p> <pre><code> &lt;property name="acquireIncrement" value="2"/&gt; &lt;property name="initialPoolSize" value="6"/&gt; &lt;property name="maxIdleTime" value="21600"/&gt; &lt;property name="maxPoolSize" value="10"/&gt; &lt;property name="maxStatements" value="0"/&gt; &lt;property name="minPoolSize" value="2"/&gt; &lt;property name="idleConnectionTestPeriod" value="10800"/&gt; &lt;!--&lt;property name="testConnectionOnCheckout" value="true" / &gt;--&gt; &lt;property name="preferredTestQuery" value="SELECT NOW()"/&gt; &lt;property name="maxAdministrativeTaskTime" value="3590"/&gt; &lt;property name="unreturnedConnectionTimeout" value="3595"/&gt; &lt;property name="debugUnreturnedConnectionStackTraces" value="true"/&gt; </code></pre> <p>and cp30:</p> <pre><code> &lt;prop key="c3p0.acquire_increment"&gt;3&lt;/prop&gt; &lt;prop key="c3p0.idle_test_period"&gt;300&lt;/prop&gt; &lt;prop key="c3p0.max_size"&gt;15&lt;/prop&gt; &lt;prop key="c3p0.max_statements"&gt;0&lt;/prop&gt; &lt;prop key="c3p0.min_size"&gt;3&lt;/prop&gt; &lt;prop key="c3p0.timeout"&gt;5000&lt;/prop&gt; </code></pre> <p>Mysql is not giving me any connection right now. Is there any way to display the connection usage of mysql? And can i flush these bad connections? And the most important question is, what should i do to avoid this connection pool error?</p> <p>Thanks in advance.</p>
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    1. COSounds like your problem is MySQL-related, not c3p0 itself. Anyway, can you post a stack trace, log file fragment, or something to look at?
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      1. USmazaneicha
    2. COShow us your hibernate config. Have you put c3p0 as Hibernate connection provider?
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    3. COstack trace: http://sharetext.org/U88 hibernate config: http://sharetext.org/U89
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