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https://issues.apache.org/jira/browse/HIVE-1712?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12921124#action_12921124
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Jake Farrell commented on HIVE-1712:
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bug is is in the jdo. issue is that schema in meatadatautils is a java
properties which extends from a hashtable which doesnt allow null values in
map. So when the map from the db is added to the schema with putall() it gets
the NullPointerException. This would occur for any item that is a map type in
the jdo (serde_params, sd_params, partition_params, table_params)
> Migrating metadata from derby to mysql thrown NullPointerException
> ------------------------------------------------------------------
>
> Key: HIVE-1712
> URL: https://issues.apache.org/jira/browse/HIVE-1712
> Project: Hadoop Hive
> Issue Type: Bug
> Components: Metastore
> Affects Versions: 0.5.0
> Reporter: Jake Farrell
>
> Exported derby data to csv, loaded data into mysql and ran hive query which
> worked in derby and got the following exception
> 2010-10-16 08:57:29,080 INFO metastore.ObjectStore
> (ObjectStore.java:setConf(106)) - Initialized ObjectStore
> 2010-10-16 08:57:29,552 INFO metastore.HiveMetaStore
> (HiveMetaStore.java:logStartFunction(171)) - 0: get_table : db=default
> tbl=testimport
> 2010-10-16 08:57:30,140 ERROR metadata.Hive (Hive.java:getTable(395)) -
> java.lang.NullPointerException
> at java.util.Hashtable.put(Hashtable.java:394)
> at java.util.Hashtable.putAll(Hashtable.java:466)
> at
> org.apache.hadoop.hive.metastore.MetaStoreUtils.getSchema(MetaStoreUtils.java:520)
> at
> org.apache.hadoop.hive.metastore.MetaStoreUtils.getSchema(MetaStoreUtils.java:489)
> at org.apache.hadoop.hive.ql.metadata.Hive.getTable(Hive.java:381)
> at org.apache.hadoop.hive.ql.metadata.Hive.getTable(Hive.java:333)
> at
> org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.getMetaData(SemanticAnalyzer.java:683)
> at
> org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:5200)
> at
> org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:105)
> at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:275)
> at org.apache.hadoop.hive.ql.Driver.runCommand(Driver.java:320)
> at org.apache.hadoop.hive.ql.Driver.run(Driver.java:312)
> at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:123)
> at
> org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:181)
> at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:287)
> 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.apache.hadoop.util.RunJar.main(RunJar.java:156)
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