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Get Exception :Cannot get a connection, pool error Timeout waiting for idle object

 
Lalit Tomar
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Stack Trace :
org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot get a connection, pool error Timeout waiting for idle object
at org.apache.tomcat.dbcp.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:114)
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044)
at com.DB.db.getConnection(db.java:41)
at com.VL01N.RunnableThread.run(RunnableThread.java:60)
at java.lang.Thread.run(Unknown Source)
Caused by: java.util.NoSuchElementException: Timeout waiting for idle object
at org.apache.tomcat.dbcp.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1134)
at org.apache.tomcat.dbcp.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:106)
... 4 more
 
K. Tsang
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How are you getting the database connection?

Are you running this on an application server like Tomcat or console app? How is the data source/connection pool set up (please show XML)?
 
Lalit Tomar
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i have shown you xml upper.....i run from tocmat?
 
K. Tsang
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What's the initial size or min pool size of the connection pool? I recall most of these configurations the default should be zero.
 
Lalit Tomar
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I didn't give any pool size .
 
Dave Tolls
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Lalit Tomar wrote:I didn't give any pool size .


How many threads are you launching?
Are each of those threads closing the connections they get?

Add some debug logging (even simple System.out.println() calls), probably in the com.DB.db.getConnection and the com.VL01N.RunnableThread.run methods to track the grabbing of connections, and wherever you hand those connections back.
 
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