Amazon Hive 中的多分隔符 SerDe 设置

Posted 2023-04-18

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【中文标题】Amazon Hive 中的多分隔符 SerDe 设置【英文标题】：MultiDelimiterSerDe setup in Amazon Hive 【发布时间】：2019-01-24 18:34:46 【问题描述】：

我正在尝试在表格插入中使用多重分隔符，以便在亚马逊 aws 上的 emr 中进行配置单元作业。如此链接中所述。文件的分隔符是“|”。

https://cwiki.apache.org/confluence/display/Hive/MultiDelimitSerDe

但是，我最终不得不使用...

ROW FORMAT SERDE 'org.apache.hadoop.hive.contrib.serde2.MultiDelimitSerDe'

而不是记录在案的...

ROW FORMAT SERDE 'org.apache.hadoop.hive.serde2.MultiDelimitSerDe'

为了让它不给我这个错误。

FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. Cannot validate serde: org.apache.hadoop.hive.serde2.MultiDelimitSerDe

好的。所以当我没有得到那个错误时，通过添加.contrib，我得到这个错误是由 Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.ClassNotFoundException: Class org.找不到 apache.hadoop.hive.contrib.serde2.MultiDelimitSerDe

Status: Failed
Vertex failed, vertexName=Map 1, vertexId=vertex_1548264520414_0027_1_00, diagnostics=[Task failed, taskId=task_1548264520414_0027_1_00_000021, diagnostics=[TaskAttempt 0 failed, info=[Error: Error while running task ( failure ) : attempt_1548264520414_0027_1_00_000021_0:java.lang.RuntimeException: java.lang.RuntimeException: Map operator initialization failed
at org.apache.hadoop.hive.ql.exec.tez.TezProcessor.initializeAndRunProcessor(TezProcessor.java:211)
at org.apache.hadoop.hive.ql.exec.tez.TezProcessor.run(TezProcessor.java:168)
at org.apache.tez.runtime.LogicalIOProcessorRuntimeTask.run(LogicalIOProcessorRuntimeTask.java:370)
at org.apache.tez.runtime.task.TaskRunner2Callable$1.run(TaskRunner2Callable.java:73)
at org.apache.tez.runtime.task.TaskRunner2Callable$1.run(TaskRunner2Callable.java:61)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1840)
at org.apache.tez.runtime.task.TaskRunner2Callable.callInternal(TaskRunner2Callable.java:61)
at org.apache.tez.runtime.task.TaskRunner2Callable.callInternal(TaskRunner2Callable.java:37)
at org.apache.tez.common.CallableWithNdc.call(CallableWithNdc.java:36)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.RuntimeException: Map operator initialization failed
at     org.apache.hadoop.hive.ql.exec.tez.MapRecordProcessor.init(MapRecordProcessor.java:354)
at org.apache.hadoop.hive.ql.exec.tez.TezProcessor.initializeAndRunProcessor(TezProcessor.java:184)
... 14 more
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.ClassNotFoundException: Class org.apache.hadoop.hive.contrib.serde2.MultiDelimitSerDe not found
at org.apache.hadoop.hive.ql.exec.MapOperator.getConvertedOI(MapOperator.java:328)
at org.apache.hadoop.hive.ql.exec.MapOperator.setChildren(MapOperator.java:420)
at org.apache.hadoop.hive.ql.exec.tez.MapRecordProcessor.init(MapRecordProcessor.java:286)
... 15 more

所以我一直在读到您必须添加 .jar 文件。

https://community.hortonworks.com/questions/82189/hive-cannot-see-jar.html

所以我尝试了各种方法来让它发挥作用。它说它正在将它添加到类路径中。

hive> add jar /usr/lib/hive/lib/hive-contrib-2.3.3-amzn-1.jar
> ;
Added [/usr/lib/hive/lib/hive-contrib-2.3.3-amzn-1.jar] to class path
Added resources: [/usr/lib/hive/lib/hive-contrib-2.3.3-amzn-1.jar]
hive> add jar /usr/lib/hive/lib/hive-contrib.jar
> ;
Added [/usr/lib/hive/lib/hive-contrib.jar] to class path
Added resources: [/usr/lib/hive/lib/hive-contrib.jar]
hive> exit;

所以我不知道该怎么办。尽管我添加了 hive-contrib 的 .jar 文件，但它的行为好像不在类路径中。我也试过跑步...