com.mysql.jdbc.exceptions.MySQLNonTransientConnectionException: Can't call rollback when autocommit=true

问题

Im using Jboss5.0 with mysql in my application. and there will be lot of concurrent actions and DB contains considerably lot of records. this error is coming frequently.. every now and then.

 com.mysql.jdbc.exceptions.MySQLNonTransientConnectionException:
 Can't call rollback when
 autocommit=true    at
 com.mysql.jdbc.SQLError.createSQLException(SQLError.java:888)
    at
 com.mysql.jdbc.Connection.rollback(Connection.java:5192)
    at
 org.jboss.resource.adapter.jdbc.local.LocalManagedConnection.rollback(LocalManagedConnection.java:97)
    at
 org.jboss.resource.connectionmanager.TxConnectionManager$TxConnectionEventListener.tidyup(TxConnectionManager.java:783)
    at
 org.jboss.resource.connectionmanager.BaseConnectionManager2.returnManagedConnection(BaseConnectionManager2.java:453)
    at
 org.jboss.resource.connectionmanager.TxConnectionManager$TxConnectionEventListener.connectionClosed(TxConnectionManager.java:734)
    at
 org.jboss.resource.adapter.jdbc.BaseWrapperManagedConnection.closeHandle(BaseWrapperManagedConnection.java:362)
    at
 org.jboss.resource.adapter.jdbc.WrappedConnection.close(WrappedConnection.java:155)

can anyone help?

Thanks in advance

回答1:

Either you are attempting to call rollback when auto commit is turned on, or you're using MyISAM type tables in your database which do not support transactions (and the ability to rollback).

Judging by the stacktrace, a transaction to the database is failing and in an attempt to create an SQLException and rollback the transaction, this exception is occurring. Unless there's more to the exception (like an indication as to where in your code the exception is being fired), then I would hazard a guess that it's due to MyISAM tables.

来源：https://stackoverflow.com/questions/3911968/com-mysql-jdbc-exceptions-mysqlnontransientconnectionexception-cant-call-rollb

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