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https://issues.apache.org/jira/browse/HIVE-2609?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13192699#comment-13192699
]
Thomas Weise commented on HIVE-2609:
------------------------------------
We replace them after the build.
> NPE when pruning partitions by thrift method get_partitions_by_filter
> ---------------------------------------------------------------------
>
> Key: HIVE-2609
> URL: https://issues.apache.org/jira/browse/HIVE-2609
> Project: Hive
> Issue Type: Bug
> Components: Metastore
> Affects Versions: 0.7.1
> Reporter: Min Zhou
>
> It's a datanucleus bug indeed.
> try this code:
> {code}
> boolean open = false;
> for (int i = 0; i < 5 && !open; ++i) {
> try {
> transport.open();
> open = true;
> } catch (TTransportException e) {
> System.out.println("failed to connect to MetaStore, re-trying...");
> try {
> Thread.sleep(1000);
> } catch (InterruptedException ignore) {}
> }
> }
> try {
> List<Partition> parts =
> client.get_partitions_by_filter("default", "partitioned_nation",
> "pt < '2'", (short) -1);
> for (Partition part : parts) {
> System.out.println(part.getSd().getLocation());
> }
> } catch (Exception te) {
> te.printStackTrace();
> }
> {code}
> A NPEexception would be thrown on the thrift server side
> {noformat}
> 11/11/25 13:11:55 ERROR api.ThriftHiveMetastore$Processor: Internal error
> processing get_partitions_by_filter
> java.lang.NullPointerException
> at
> org.datanucleus.store.mapped.mapping.MappingHelper.getMappingIndices(MappingHelper.java:35)
> at
> org.datanucleus.store.mapped.expression.StatementText.applyParametersToStatement(StatementText.java:194)
> at
> org.datanucleus.store.rdbms.query.RDBMSQueryUtils.getPreparedStatementForQuery(RDBMSQueryUtils.java:233)
> at
> org.datanucleus.store.rdbms.query.legacy.SQLEvaluator.evaluate(SQLEvaluator.java:115)
> at
> org.datanucleus.store.rdbms.query.legacy.JDOQLQuery.performExecute(JDOQLQuery.java:288)
> at org.datanucleus.store.query.Query.executeQuery(Query.java:1657)
> at
> org.datanucleus.store.rdbms.query.legacy.JDOQLQuery.executeQuery(JDOQLQuery.java:245)
> at org.datanucleus.store.query.Query.executeWithMap(Query.java:1526)
> at org.datanucleus.jdo.JDOQuery.executeWithMap(JDOQuery.java:334)
> at
> org.apache.hadoop.hive.metastore.ObjectStore.listMPartitionsByFilter(ObjectStore.java:1329)
> at
> org.apache.hadoop.hive.metastore.ObjectStore.getPartitionsByFilter(ObjectStore.java:1241)
> at
> org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler$40.run(HiveMetaStore.java:2369)
> at
> org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler$40.run(HiveMetaStore.java:2366)
> at
> org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.executeWithRetry(HiveMetaStore.java:307)
> at
> org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.get_partitions_by_filter(HiveMetaStore.java:2366)
> at
> org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Processor$get_partitions_by_filter.process(ThriftHiveMetastore.j
> ava:6099)
> at
> org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Processor.process(ThriftHiveMetastore.java:4789)
> at
> org.apache.hadoop.hive.metastore.HiveMetaStore$TLoggingProcessor.process(HiveMetaStore.java:3167)
> at
> org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:253)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:662)
> {noformat}
> A null JavaTypeMapping was passed into
> org.datanucleus.store.mapped.mapping.MappingHelper.(int initialPosition,
> JavaTypeMapping mapping), that caused NPE.
> After digged into the datanucleus source, I found that the null value was
> born in the constructor of
> org.datanucleus.store.mapped.expression.SubstringExpression. see
> {code}
> /**
> * Constructs the substring
> * @param str the String Expression
> * @param begin The start position
> * @param end The end position expression
> **/
> public SubstringExpression(StringExpression str, NumericExpression begin,
> NumericExpression end)
> {
> super(str.getQueryExpression());
> st.append("SUBSTRING(").append(str).append(" FROM ")
> .append(begin.add(new IntegerLiteral(qs, mapping,
> BigInteger.ONE)))
> .append(" FOR ").append(end.sub(begin)).append(')');
> }
> {code}
> The field mapping hasn't been instanced at that moment.
> How do you deal with such a external bug?
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