pentaho/kettle java.lang.NullPointerException

26-02-2021 19:28:19 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:18 - WL_DWT_INOUT - ERROR (version 8.3.0.0-371, build 8.3.0.0-371 from 2019-06-11 11.09.08 by buildguy) : java.lang.NullPointerException
26-02-2021 19:28:19 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:18 - WL_DWT_INOUT - at org.pentaho.osgi.blueprint.collection.utils.ServiceMap.getItem(ServiceMap.java:35)
26-02-2021 19:28:19 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:18 - WL_DWT_INOUT - at org.pentaho.osgi.metastore.locator.api.impl.MetastoreLocatorImpl.getExplicitMetastore(MetastoreLocatorImpl.java:39)
26-02-2021 19:28:19 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:18 - WL_DWT_INOUT - at Proxy0d7f2c82_4b64_48c6_a1fe_8afb5ade0840.getExplicitMetastore(Unknown Source)
26-02-2021 19:28:19 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:18 - WL_DWT_INOUT - at Proxy2f2c5d5c_48d9_4255_88bc_9a598dd01b9b.getExplicitMetastore(Unknown Source)
26-02-2021 19:28:19 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:18 - WL_DWT_INOUT - at org.pentaho.big.data.impl.vfs.hdfs.nc.NamedClusterProvider.closeFileSystem(NamedClusterProvider.java:196)
26-02-2021 19:28:19 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:18 - WL_DWT_INOUT - at org.pentaho.di.core.vfs.ConcurrentFileSystemManager.closeEmbeddedFileSystem(ConcurrentFileSystemManager.java:192)
26-02-2021 19:28:19 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:18 - WL_DWT_INOUT - at org.pentaho.di.core.vfs.KettleVFS.closeEmbeddedFileSystem(KettleVFS.java:545)
26-02-2021 19:28:19 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:18 - WL_DWT_INOUT - at org.pentaho.di.base.AbstractMeta.disposeEmbeddedMetastoreProvider(AbstractMeta.java:2054)
26-02-2021 19:28:19 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:18 - WL_DWT_INOUT - at org.pentaho.di.job.Job.execute(Job.java:632)
26-02-2021 19:28:19 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:18 - WL_DWT_INOUT - at org.pentaho.di.job.Job.access$000(Job.java:121)
26-02-2021 19:28:19 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:18 - WL_DWT_INOUT - at org.pentaho.di.job.Job$1.run(Job.java:804)
26-02-2021 19:28:19 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:18 - WL_DWT_INOUT - at java.lang.Thread.run(Thread.java:748)

26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - ERROR (version 8.3.0.0-371, build 8.3.0.0-371 from 2019-06-11 11.09.08 by buildguy) : /V3_ETL_Mapping/COMMON_NEW/WL_DWT_INOUT
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - org.pentaho.di.core.exception.KettleException:
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - Unexpected error occurred while launching entry [T_DWT_INOUT_SHT_IN.0]
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at java.lang.Thread.run (Thread.java:748)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at org.pentaho.di.job.Job$1.run (Job.java:804)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at org.pentaho.di.job.Job.access$000 (Job.java:121)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at org.pentaho.di.job.Job.execute (Job.java:632)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at org.pentaho.di.base.AbstractMeta.disposeEmbeddedMetastoreProvider (AbstractMeta.java:2054)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at org.pentaho.di.core.vfs.KettleVFS.closeEmbeddedFileSystem (KettleVFS.java:545)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at org.pentaho.di.core.vfs.ConcurrentFileSystemManager.closeEmbeddedFileSystem (ConcurrentFileSystemManager.java:192)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at org.pentaho.big.data.impl.vfs.hdfs.nc.NamedClusterProvider.closeFileSystem (NamedClusterProvider.java:196)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at Proxy2f2c5d5c_48d9_4255_88bc_9a598dd01b9b.getExplicitMetastore (null:-1)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at Proxy0d7f2c82_4b64_48c6_a1fe_8afb5ade0840.getExplicitMetastore (null:-1)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at org.pentaho.osgi.metastore.locator.api.impl.MetastoreLocatorImpl.getExplicitMetastore (MetastoreLocatorImpl.java:39)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at org.pentaho.osgi.blueprint.collection.utils.ServiceMap.getItem (ServiceMap.java:35)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at org.pentaho.di.job.Job$1.run(Job.java:808)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at java.lang.Thread.run(Thread.java:748)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - Caused by: java.lang.NullPointerException
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at org.pentaho.osgi.blueprint.collection.utils.ServiceMap.getItem(ServiceMap.java:35)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at org.pentaho.osgi.metastore.locator.api.impl.MetastoreLocatorImpl.getExplicitMetastore(MetastoreLocatorImpl.java:39)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at Proxy0d7f2c82_4b64_48c6_a1fe_8afb5ade0840.getExplicitMetastore(Unknown Source)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at Proxy2f2c5d5c_48d9_4255_88bc_9a598dd01b9b.getExplicitMetastore(Unknown Source)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at org.pentaho.big.data.impl.vfs.hdfs.nc.NamedClusterProvider.closeFileSystem(NamedClusterProvider.java:196)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at org.pentaho.di.core.vfs.ConcurrentFileSystemManager.closeEmbeddedFileSystem(ConcurrentFileSystemManager.java:192)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at org.pentaho.di.core.vfs.KettleVFS.closeEmbeddedFileSystem(KettleVFS.java:545)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at org.pentaho.di.base.AbstractMeta.disposeEmbeddedMetastoreProvider(AbstractMeta.java:2054)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at org.pentaho.di.job.Job.execute(Job.java:632)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at org.pentaho.di.job.Job.access$000(Job.java:121)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - at org.pentaho.di.job.Job$1.run(Job.java:804)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - ... 1 more
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - ERROR (version 8.3.0.0-371, build 8.3.0.0-371 from 2019-06-11 11.09.08 by buildguy) : An error occurred executing this job entry :
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - ERROR (version 8.3.0.0-371, build 8.3.0.0-371 from 2019-06-11 11.09.08 by buildguy) : org.pentaho.di.core.exception.KettleException:
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - Unexpected error occurred while launching entry [T_DWT_INOUT_SHT_IN.0]
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at java.lang.Thread.run (Thread.java:748)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at org.pentaho.di.job.Job$1.run (Job.java:804)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at org.pentaho.di.job.Job.access$000 (Job.java:121)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at org.pentaho.di.job.Job.execute (Job.java:632)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at org.pentaho.di.base.AbstractMeta.disposeEmbeddedMetastoreProvider (AbstractMeta.java:2054)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at org.pentaho.di.core.vfs.KettleVFS.closeEmbeddedFileSystem (KettleVFS.java:545)
26-02-2021 19:28:26 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at org.pentaho.di.core.vfs.ConcurrentFileSystemManager.closeEmbeddedFileSystem (ConcurrentFileSystemManager.java:192)
26-02-2021 19:28:30 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at org.pentaho.big.data.impl.vfs.hdfs.nc.NamedClusterProvider.closeFileSystem (NamedClusterProvider.java:196)
26-02-2021 19:28:30 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at Proxy2f2c5d5c_48d9_4255_88bc_9a598dd01b9b.getExplicitMetastore (null:-1)
26-02-2021 19:28:30 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at Proxy0d7f2c82_4b64_48c6_a1fe_8afb5ade0840.getExplicitMetastore (null:-1)
26-02-2021 19:28:30 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at org.pentaho.osgi.metastore.locator.api.impl.MetastoreLocatorImpl.getExplicitMetastore (MetastoreLocatorImpl.java:39)
26-02-2021 19:28:30 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at org.pentaho.osgi.blueprint.collection.utils.ServiceMap.getItem (ServiceMap.java:35)
26-02-2021 19:28:30 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT -
26-02-2021 19:28:30 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at org.pentaho.di.job.Job$1.run(Job.java:808)
26-02-2021 19:28:30 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at java.lang.Thread.run(Thread.java:748)
26-02-2021 19:28:30 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - Caused by: java.lang.NullPointerException
26-02-2021 19:28:30 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at org.pentaho.osgi.blueprint.collection.utils.ServiceMap.getItem(ServiceMap.java:35)
26-02-2021 19:28:30 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at org.pentaho.osgi.metastore.locator.api.impl.MetastoreLocatorImpl.getExplicitMetastore(MetastoreLocatorImpl.java:39)
26-02-2021 19:28:30 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at Proxy0d7f2c82_4b64_48c6_a1fe_8afb5ade0840.getExplicitMetastore(Unknown Source)
26-02-2021 19:28:30 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at Proxy2f2c5d5c_48d9_4255_88bc_9a598dd01b9b.getExplicitMetastore(Unknown Source)
26-02-2021 19:28:30 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at org.pentaho.big.data.impl.vfs.hdfs.nc.NamedClusterProvider.closeFileSystem(NamedClusterProvider.java:196)
26-02-2021 19:28:30 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at org.pentaho.di.core.vfs.ConcurrentFileSystemManager.closeEmbeddedFileSystem(ConcurrentFileSystemManager.java:192)
26-02-2021 19:28:30 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at org.pentaho.di.core.vfs.KettleVFS.closeEmbeddedFileSystem(KettleVFS.java:545)
26-02-2021 19:28:30 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at org.pentaho.di.base.AbstractMeta.disposeEmbeddedMetastoreProvider(AbstractMeta.java:2054)
26-02-2021 19:28:30 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at org.pentaho.di.job.Job.execute(Job.java:632)
26-02-2021 19:28:30 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at org.pentaho.di.job.Job.access$000(Job.java:121)
26-02-2021 19:28:30 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - at org.pentaho.di.job.Job$1.run(Job.java:804)
26-02-2021 19:28:30 CST WF_Dwt_Inout-1468 INFO - 2021/02/26 19:28:26 - WL_DWT_INOUT - ... 1 more

1、作业中有10个并发的转换；
(There are 10 concurrent transformations in the job;)
2、作业的路径和转换不在一个路径中；
(The Job and transformation are not in the same path;)
3、错误是偶然发生的，运行1000次不一定能重现一次；
(The error is accidental, which may not recur after 1000 times of operation;)
4、错误发生是随机的，有可能发生在其它类似作业中；
(The error occurrence is random and may occur in other jobs;)
5、数据库资源库
(Database Repository)
6、有偿解决问题
(Pay to solve problems)

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