Death linked to hibernate JNDI query WebSphere
Aix + WebSphere 6.1 + Oracle + Quartz1.65 + Sping2.5.6 + Hibernate 3.3.1
Phenomenon:
Node & Server of WebSphere hanging dead, JVM stack overflow, WebSphere district where the JVM core dump file to be filled
Reasons:
Quartz managed threads running in a state of non-container hosting (from WebSphere control), access to less than a J2EE context, and the use of threads to Hibernete, in trying to java: comp / UserTransaction when JTA inquiries throw NamingException, and Hibernete JTATransactionFactory. the existence of the following java code BUG:
protected UserTransaction getUserTransaction() {
log.trace( "Attempting to locate UserTransaction via JNDI [{}]", getUserTransactionName() );
try {
UserTransaction ut = ( UserTransaction ) getInitialContext().lookup( getUserTransactionName() );
if ( ut == null ) {
throw new TransactionException( "Naming service lookup for UserTransaction returned null [" + getUserTransactionName() +"]" );
}
log.trace( "Obtained UserTransaction" );
return ut;
}
catch ( NamingException ne ) {
throw new TransactionException( "Could not find UserTransaction in JNDI [" + getUserTransaction() + "]", ne );
}
} Which throw new TransactionException ( "Could not find UserTransaction in JNDI [" + getUserTransaction () + "]", according to the author's meaning should be getUserTransactionName () mistakenly written the getUserTransaction () lead to infinite recursive calls
Solutions:
Option 1:
JTATransactionFactory.java rewrite the getUserTransaction () method
Code is as follows
protected UserTransaction getUserTransaction() {
log.trace( "Attempting to locate UserTransaction via JNDI [{}]", getUserTransactionName() );
if(uTran != null)
return uTran;
try {
uTran = ( UserTransaction ) getInitialContext().lookup( getUserTransactionName() );
if ( uTran == null ) {
uTran = ( UserTransaction ) getInitialContext().lookup( CLIENT_USER_TRANSACTION_NAME );
if(uTran != null)
return uTran;
else
throw new TransactionException( "Naming service lookup for UserTransaction returned null [" + getUserTransactionName() +"]" );
}
log.trace( "Obtained UserTransaction" );
return uTran;
}
catch ( NamingException ne ) {
try {
uTran = ( UserTransaction ) getInitialContext().lookup( CLIENT_USER_TRANSACTION_NAME );
} catch (NamingException e) {
e.printStackTrace();
}
if(uTran != null)
return uTran;
else
throw new TransactionException( "Could not find UserTransaction in JNDI [" + getUserTransactionName() + "]", ne );
}
} Which CLIENT_USER_TRANSACTION_NAME = "jta / usertransaction"
Option 2:
Custom category hibernate.transaction.factory_class
Spring into the use of usertransaction
Heavy getUserTransaction
protected UserTransaction getUserTransaction() {
return userTransaction;
}
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