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From Matthew Hixson <hix...@poindextrose.org>
Subject [dbcp] java.io.EOFException, underlying cause: null
Date Mon, 20 Apr 2009 05:09:14 GMT
Occasionally I'll see this exception in our logs.  I have setup the  
pool like so:

GenericObjectPool pool = new GenericObjectPool(null);
pool.setWhenExhaustedAction(GenericObjectPool.WHEN_EXHAUSTED_GROW);
pool.setTestOnBorrow(true);
pool.setTestOnReturn(true);
pool.setTestWhileIdle(true);

Is that not sufficient to have DBCP test a connection before releasing  
it from the pool for use?
   Thanks,
     -M@


-------------------------------------------
java.sql.SQLException: Communication link failure:  
java.io.EOFException, underlying cause: null

** BEGIN NESTED EXCEPTION **

java.io.EOFException

STACKTRACE:

java.io.EOFException
	at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1395)
	at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1539)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1930)
	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1168)
	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1279)
	at com.mysql.jdbc.Connection.execSQL(Connection.java:2281)
	at  
com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java: 
1634)
	at  
org 
.apache 
.commons 
.dbcp 
.DelegatingPreparedStatement 
.executeQuery(DelegatingPreparedStatement.java:93)
...

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