同时使用2个会话Pentaho kettle使用sqlldr将两个不同的csv文件加载到2个不同的表时出现异常

当我调用两个不同的转换将两组不同的csv文件加载到两个不同的表中时，控制台中出现以下异常。这两项任务之间没有共同之处。我正在从两个不同的控制台执行kitchen.bat来调用这些转换

这两个方案中的一个在一起运行时最常失败，尽管在多次测试该方案后并不总是如此。 一次运行一个不会出现任何错误，并且运行成功。是什么导致此异常

tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 - ERROR>SQL*Loader-951: Error calling once/load initialization
tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 - ERROR>ORA-00604: error occurred at recursive SQL level 1
tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 - ERROR>ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired
tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 - ERROR (version 5.4.0.1-130, build 1 from 2015-06-14_12-34-55 by buildguy) : Error in step, asking everyone to stop because of:
tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 - IO exception occured: The pipe has been ended
tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 - The pipe has been ended
tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 - ERROR (version 5.4.0.1-130, build 1 from 2015-06-14_12-34-55 by buildguy) : Error while closing output
tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 - ERROR (version 5.4.0.1-130, build 1 from 2015-06-14_12-34-55 by buildguy) : java.io.IOException: The pipe is being closed
tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 -                at java.io.FileOutputStream.writeBytes(Native Method)
tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 -                at java.io.FileOutputStream.write(FileOutputStream.java:345)
tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 -                at java.io.BufferedOutputStream.write(BufferedOutputStream.java:122)
tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 -                at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:221)
tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 -                at sun.nio.cs.StreamEncoder.implClose(StreamEncoder.java:316)
tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 -                at sun.nio.cs.StreamEncoder.close(StreamEncoder.java:149)
tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 -                at java.io.OutputStreamWriter.close(OutputStreamWriter.java:233)
tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 -                at java.io.BufferedWriter.close(BufferedWriter.java:266)
tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 -                at org.pentaho.di.trans.steps.orabulkloader.OraBulkDataOutput.close(OraBulkDataOutput.java:95)
tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 -                at org.pentaho.di.trans.steps.orabulkloader.OraBulkLoader.dispose(OraBulkLoader.java:598)
tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 -                at org.pentaho.di.trans.step.RunThread.run(RunThread.java:96)
tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 -                at java.lang.Thread.run(Thread.java:745)
tasklist: 2019/10/04 14:27:51 - SOME_FILE_INPUT.0 - Finished processing (I=10058, O=0, R=5, W=10056, U=0, E=0)
tasklist: 2019/10/04 14:27:51 - SOME_TRANSFORMATION_NAME - ERROR (version 5.4.0.1-130, build 1 from 2015-06-14_12-34-55 by buildguy) : Errors detected!
tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 - Exit Value of sqlldr: 1
tasklist: 2019/10/04 14:27:51 - SOME_STEP_NAME.0 - Finished processing (I=0, O=54, R=55, W=54, U=0, E=1)
tasklist: 2019/10/04 14:27:51 - SOME_TRANSFORMATION_NAME - Transformation detected one or more steps with errors.
tasklist: 2019/10/04 14:27:51 - SOME_TRANSFORMATION_NAME - Transformation is killing the other steps!
tasklist: 2019/10/04 14:27:51 - SOME_TRANSFORMATION_NAME - ERROR (version 5.4.0.1-130, build 1 from 2015-06-14_12-34-55 by buildguy) : Errors detected!

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sql加载程序锁定的次数似乎超出了预期，导致其他会话超时

确保这些表没有连接它们的外键。如果不是这样，sql加载器可能会锁定整个架构或其他资源

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也请检查此项：

在每个sqlldr实例中使用唯一的控制文件解决了此问题

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使用同一控制文件从不同作业并行执行sqlldr会导致sqlldr的一个实例覆盖另一个sqlldr实例以前写入的控制文件中的数据，从而导致错误和锁定。

我试图从错误日志中查找代码行，发现它与数据文件有关。进一步挖掘后，我发现sql loader使用了一个控制文件和一个dat文件。在这两个作业中，两个作业中的控件文件名相同。因此，可能是文件被一个作业锁定，而另一个作业无法使用。将尝试使用不同的文件名，然后还原。