использую Quartz 1.7.3 в связке со Spring. Создал тестовый Job и Trigger.

org.quartz.jobStore.class = org.quartz.impl.jdbcjobstore.JobStoreCMT

запустил в тестовом режиме приложение. Время от времени получаю следующий exception:

21:03:20,109 ERROR SimpleThreadPool:557 - Error while executing the Runnable: 
java.lang.reflect.UndeclaredThrowableException
    at $Proxy17.rollback(Unknown Source)
    at org.quartz.impl.jdbcjobstore.JobStoreSupport.rollbackConnection(JobStoreSupport.java:3583)
    at org.quartz.impl.jdbcjobstore.JobStoreSupport.executeInNonManagedTXLock(JobStoreSupport.java:3749)
    at org.quartz.impl.jdbcjobstore.JobStoreSupport.executeInNonManagedTXLock(JobStoreSupport.java:3704)
    at org.quartz.impl.jdbcjobstore.JobStoreSupport.triggeredJobComplete(JobStoreSupport.java:2953)
    at org.quartz.core.QuartzScheduler.notifyJobStoreJobComplete(QuartzScheduler.java:1708)
    at org.quartz.core.JobRunShell.run(JobRunShell.java:270)
    at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:546)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.quartz.impl.jdbcjobstore.AttributeRestoringConnectionInvocationHandler.invoke(AttributeRestoringConnectionInvocationHandler.java:71)
    ... 8 more
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Can't call rollback when autocommit=true
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
    at com.mysql.jdbc.Util.getInstance(Util.java:381)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:984)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926)
    at com.mysql.jdbc.ConnectionImpl.rollback(ConnectionImpl.java:4741)
    at org.enhydra.jdbc.core.CoreConnection.rollback(CoreConnection.java:223)
    at org.enhydra.jdbc.standard.StandardXAConnectionHandle.rollback(StandardXAConnectionHandle.java:137)

с чем это может быть связано и почему при огромном количестве нормальных вызовов он все-таки время от времени вываливается ?