Atomikos的使用過程中要注意的事

 在使用Atomikos過程中遇到的一些問題，以作記錄：

MySQL does not support TMJOIN

 MySQL does not allow for joining an existing XA transaction branch, as mentioned here:http://dev.mysql.com/doc/refman/5.0/en/xa-restrictions.html - the consequence is that one transaction accessing the same MySQL multiple times can run into problems like this:

com.atomikos.datasource.ResourceException: resume for XID 192.168.162.50.tm0000100012192.168.162.50.tm1 raised -5: invalid arguments were given for the XA operation
   at com.atomikos.datasource.xa.XAResourceTransaction.resume(Unknown Source)
   at com.atomikos.jdbc.ConnectionProxy.invoke(Unknown Source)
   at $Proxy8.prepareStatement(Unknown Source)
   at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:505)
   at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:94)
   at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:87)
   at org.hibernate.jdbc.AbstractBatcher.prepareBatchStatement(AbstractBatcher.java:222)
   at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2224)
   at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2660)
   at org.hibernate.action.EntityInsertAction.execute(EntityInsertAction.java:56)
   at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:250)
   at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:234)
   at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:141)
   at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
   at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
   at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
   at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:343)
   at org.hibernate.transaction.JTATransaction.commit(JTATransaction.java:135)
[...] 

A possible workaround might be to try and start TransactionsEssentials with the parametercom.atomikos.icatch.serial_jta_transactions set to false.

com.atomikos.icatch.serial_jta_transactions=false

Also, make sure to set the following property on the MySQL datasource:

 pinGlobalTxToPhysicalConnection="true"　　

　　以上是Atomikos官方關於Mysql bug的一些說明，解決這個問題按照官方說明，我們可以在jta.properties或者transactions.properties里面添加com.atomikos.icatch.serial_jta_transactions=false這么一段，可能我姿勢不正確，沒起作用。第二種方法是在Mysql的XADataSource的pinGlobalTxToPhysicalConnection設置為true，這可難辦了，我使用的是druid的數據源，好像沒有pinGlobalTxToPhysicalConnection這個的屬性吧？苦惱了一段時間，查了一些資料都沒有發現解決辦法，突然靈機一動，試一下在url后綴加上這段東西，沒想到真行了。

jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&pinGlobalTxToPhysicalConnection=true

MyBatis不能回滾事務？

2016-10-24 11:07:04,458 INFO  [com.atomikos.datasource.xa.XAResourceTransaction] - XAResource.end ( 31302E3232382E37352E3132352E746D30303030313030303134:31302E3232382E37352E3132352E746D31 , XAResource.TMSUCCESS ) on resource apikore represented by XAResource instance com.mysql.jdbc.jdbc2.optional.JDBC4SuspendableXAConnection@12a8ee2
2016-10-24 11:07:04,462 INFO  [com.atomikos.datasource.xa.XAResourceTransaction] - XAResource.rollback ( 31302E3232382E37352E3132352E746D30303030313030303134:31302E3232382E37352E3132352E746D31 ) on resource apikore represented by XAResource instance com.mysql.jdbc.jdbc2.optional.JDBC4SuspendableXAConnection@12a8ee2
2016-10-24 11:07:04,466 INFO  [com.atomikos.icatch.imp.CompositeTransactionImp] - rollback() done of transaction 127.0.0.1.tm0000100014

　　檢查一下控制台是否有着段輸出，如果有，那么應該是回滾成功的。如果你斷點spring的TransactionManager確定事務應經啟用的情況下，出錯了卻沒有回滾，請檢查一下，事務設置是否帶有rollback-for="Exception"

 <tx:method name="*" propagation="REQUIRED" rollback-for="Exception"/> 

 Connection pool exhausted - try increasing 'maxPoolSize'

錯誤：

[ERROR][2016-10-26 14:25:31,937][org.hibernate.engine.jdbc.spi.SqlExceptionHelper]Connection pool exhausted - try increasing 'maxPoolSize' and/or 'borrowConnectionTimeout' on the DataSourceBean.
[ERROR][2016-10-26 14:25:31,952][org.apache.struts2.dispatcher.Dispatcher]Exception occurred during processing request: Could not open connection

在AtomikosDataSourceBean配置添加如下代碼：

 <property name="minPoolSize" value="5" />
 <property name="maxPoolSize" value="20" />
 <property name="borrowConnectionTimeout" value="60" />    

 Error in recovery

錯誤：

[ERROR][2016-11-03 10:17:30,771][com.atomikos.recovery.imp.CachedRepository]Corrupted log file - restart JVM
com.atomikos.recovery.LogReadException: java.lang.ArrayIndexOutOfBoundsException: 1
    at com.atomikos.recovery.imp.FileSystemRepository.getAllCoordinatorLogEntries(FileSystemRepository.java:139)
    at com.atomikos.recovery.imp.CachedRepository.init(CachedRepository.java:47)
    at com.atomikos.icatch.provider.imp.AssemblerImp.createCoordinatorLogEntryRepository(AssemblerImp.java:184)
    at com.atomikos.icatch.provider.imp.AssemblerImp.assembleTransactionService(AssemblerImp.java:135)
    at com.atomikos.icatch.config.Configuration.assembleSystemComponents(Configuration.java:484)
    at com.atomikos.icatch.config.Configuration.init(Configuration.java:446)
    at com.atomikos.icatch.jta.UserTransactionManager.startupTransactionService(UserTransactionManager.java:71)
    at com.atomikos.icatch.jta.UserTransactionManager.initializeTransactionManagerSingleton(UserTransactionManager.java:60)
    at com.atomikos.icatch.jta.UserTransactionManager.checkSetup(UserTransactionManager.java:52)
    at com.atomikos.icatch.jta.UserTransactionManager.init(UserTransactionManager.java:122)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

atomikos版本升級到4.0.4解決。

　　后續若有發現問題，再行添加。