[
https://issues.apache.org/jira/browse/HIVE-25417?focusedWorklogId=632866&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-632866
]
ASF GitHub Bot logged work on HIVE-25417:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 03/Aug/21 12:04
Start Date: 03/Aug/21 12:04
Worklog Time Spent: 10m
Work Description: maheshk114 opened a new pull request #2556:
URL: https://github.com/apache/hive/pull/2556
### What changes were proposed in this pull request?
While getting the stats from the backend database, convert the bit vector
column having magic value ("HL") with null bit vector.
### Why are the changes needed?
Causes exception while merging the stats in Postgres backend
### Does this PR introduce _any_ user-facing change?
No
### How was this patch tested?
Unit tested
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Issue Time Tracking
-------------------
Worklog Id: (was: 632866)
Remaining Estimate: 0h
Time Spent: 10m
> Null bit vector is not handled while getting the stats for Postgres backend
> ---------------------------------------------------------------------------
>
> Key: HIVE-25417
> URL: https://issues.apache.org/jira/browse/HIVE-25417
> Project: Hive
> Issue Type: Sub-task
> Components: HiveServer2
> Reporter: mahesh kumar behera
> Assignee: mahesh kumar behera
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> While adding stats with null bit vector, a special string "HL" is added as
> Postgres does not support null value for byte columns. But while getting the
> stats, the conversion to null is not done. This is causing failure during
> deserialisation of bit vector field if the existing stats is used for merge.
>
> {code:java}
> The input stream is not a HyperLogLog stream. 7276-1 instead of 727676 or
> 7077^M at
> org.apache.hadoop.hive.common.ndv.hll.HyperLogLogUtils.checkMagicString(HyperLogLogUtils.java:349)^M
> at
> org.apache.hadoop.hive.common.ndv.hll.HyperLogLogUtils.deserializeHLL(HyperLogLogUtils.java:139)^M
> at
> org.apache.hadoop.hive.common.ndv.hll.HyperLogLogUtils.deserializeHLL(HyperLogLogUtils.java:213)^M
> at
> org.apache.hadoop.hive.common.ndv.hll.HyperLogLogUtils.deserializeHLL(HyperLogLogUtils.java:227)^M
> at
> org.apache.hadoop.hive.common.ndv.NumDistinctValueEstimatorFactory.getNumDistinctValueEstimator(NumDistinctValueEstimatorFactory.java:53)^M
> at
> org.apache.hadoop.hive.metastore.columnstats.cache.LongColumnStatsDataInspector.updateNdvEstimator(LongColumnStatsDataInspector.java:124)^M
> at
> org.apache.hadoop.hive.metastore.columnstats.cache.LongColumnStatsDataInspector.getNdvEstimator(LongColumnStatsDataInspector.java:107)^M
> at
> org.apache.hadoop.hive.metastore.columnstats.merge.LongColumnStatsMerger.merge(LongColumnStatsMerger.java:36)^M
> at
> org.apache.hadoop.hive.metastore.utils.MetaStoreUtils.mergeColStats(MetaStoreUtils.java:1174)^M
> at
> org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.updateTableColumnStatsWithMerge(HiveMetaStore.java:8934)^M
> at
> org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.set_aggr_stats_for(HiveMetaStore.java:8800)^M
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)^M
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)^M
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)^M
> at java.lang.reflect.Method.invoke(Method.java:498)^M at
> org.apache.hadoop.hive.metastore.RetryingHMSHandler.invokeInternal(RetryingHMSHandler.java:160)^M
> at
> org.apache.hadoop.hive.metastore.RetryingHMSHandler.invoke(RetryingHMSHandler.java:121)^M
> at com.sun.proxy.$Proxy35.set_aggr_stats_for(Unknown Source)^M at
> org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Processor$set_aggr_stats_for.getResult(ThriftHiveMetastore.java:20489)^M
> at
> org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Processor$set_aggr_stats_for.getResult(ThriftHiveMetastore.java:20473)^M
> at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)^M
> at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)^M at
> org.apache.hadoop.hive.metastore.security.HadoopThriftAuthBridge$Server$TUGIAssumingProcessor$1.run(HadoopThriftAuthBridge.java:643)^M
> at
> org.apache.hadoop.hive.metastore.security.HadoopThriftAuthBridge$Server$TUGIAssumingProcessor$1.run(HadoopThriftAuthBridge.java:638)^M
> at java.security.AccessController.doPrivileged(Native Method)^M at
> javax.security.auth.Subject.doAs(Subject.java:422)^M at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1898)^M
> at
> org.apache.hadoop.hive.metastore.security.HadoopThriftAuthBridge$Server$TUGIAssumingProcessor.process(HadoopThriftAuthBridge.java:638)^M
> at
> org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:286)^M
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)^M
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)^M
> at java.lang.Thread.run(Thread.java:748) {code}
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