[ 
https://issues.apache.org/jira/browse/HIVE-22410?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

fanshilun updated HIVE-22410:
-----------------------------
    Description: 
java.lang.NullPointerException
at 
org.apache.hadoop.hive.metastore.utils.IncrementalObjectSizeEstimator$ObjectEstimator.estimateArrayElements(IncrementalObjectSizeEstimator.java:501)
 ~[hive-metastore-2.3.5.jar:2.3.5]
at 
org.apache.hadoop.hive.metastore.utils.IncrementalObjectSizeEstimator$ObjectEstimator.estimate(IncrementalObjectSizeEstimator.java:443)
 ~[hive-metastore-2.3.5.jar:2.3.5]
at 
org.apache.hadoop.hive.metastore.utils.IncrementalObjectSizeEstimator$ObjectEstimator.estimate(IncrementalObjectSizeEstimator.java:433)
 ~[hive-metastore-2.3.5.jar:2.3.5]
at 
org.apache.hadoop.hive.metastore.utils.IncrementalObjectSizeEstimator$ObjectEstimator.estimate(IncrementalObjectSizeEstimator.java:369)
 ~[hive-metastore-2.3.5.jar:2.3.5]
at 
org.apache.hadoop.hive.metastore.cached.SharedCache.populateTableInCache(SharedCache.java:1028)
 ~[hive-metastore-2.3.5.jar:2.3.5]
at 
org.apache.hadoop.hive.metastore.cached.CachedStore.prewarm(CachedStore.java:314)
 ~[hive-metastore-2.3.5.jar:2.3.5]
at 
org.apache.hadoop.hive.metastore.cached.CachedStore$CacheUpdateMasterWork.run(CachedStore.java:492)
 [hive-metastore-2.3.5.jar:2.3.5]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) 
[?:1.7.0_40]
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304) [?:1.7.0_40]
at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)
 [?:1.7.0_40]
at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
 [?:1.7.0_40]
at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
[?:1.7.0_40]
at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
[?:1.7.0_40]
at java.lang.Thread.run(Thread.java:724) [?:1.7.0_40]

*reason:*
Methods estimateArrayElements throw NPE

I found that the last class does not appear in the parent (HashMap<Class<?>, 
Object Estimator> ), and the parent does not contain the information of the 
ConcurrentHashMap Class.

The solution is to initialize the class information before using it.





  was:
java.lang.NullPointerException
at 
org.apache.hadoop.hive.metastore.utils.IncrementalObjectSizeEstimator$ObjectEstimator.estimateArrayElements(IncrementalObjectSizeEstimator.java:501)
 ~[hive-metastore-2.3.5.jar:2.3.5]
at 
org.apache.hadoop.hive.metastore.utils.IncrementalObjectSizeEstimator$ObjectEstimator.estimate(IncrementalObjectSizeEstimator.java:443)
 ~[hive-metastore-2.3.5.jar:2.3.5]
at 
org.apache.hadoop.hive.metastore.utils.IncrementalObjectSizeEstimator$ObjectEstimator.estimate(IncrementalObjectSizeEstimator.java:433)
 ~[hive-metastore-2.3.5.jar:2.3.5]
at 
org.apache.hadoop.hive.metastore.utils.IncrementalObjectSizeEstimator$ObjectEstimator.estimate(IncrementalObjectSizeEstimator.java:369)
 ~[hive-metastore-2.3.5.jar:2.3.5]
at 
org.apache.hadoop.hive.metastore.cached.SharedCache.populateTableInCache(SharedCache.java:1028)
 ~[hive-metastore-2.3.5.jar:2.3.5]
at 
org.apache.hadoop.hive.metastore.cached.CachedStore.prewarm(CachedStore.java:314)
 ~[hive-metastore-2.3.5.jar:2.3.5]
at 
org.apache.hadoop.hive.metastore.cached.CachedStore$CacheUpdateMasterWork.run(CachedStore.java:492)
 [hive-metastore-2.3.5.jar:2.3.5]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) 
[?:1.7.0_40]
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304) [?:1.7.0_40]
at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)
 [?:1.7.0_40]
at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
 [?:1.7.0_40]
at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
[?:1.7.0_40]
at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
[?:1.7.0_40]
at java.lang.Thread.run(Thread.java:724) [?:1.7.0_40]


> CachedStore Prewarm Failure NPE
> -------------------------------
>
>                 Key: HIVE-22410
>                 URL: https://issues.apache.org/jira/browse/HIVE-22410
>             Project: Hive
>          Issue Type: Bug
>          Components: Standalone Metastore
>    Affects Versions: 3.1.2, 2.3.7
>         Environment: JDK 1.7.0_40
>            Reporter: fanshilun
>            Assignee: fanshilun
>            Priority: Major
>              Labels: cachedstore
>             Fix For: 2.3.7, 3.1.3
>
>         Attachments: HIVE-22410.1.patch
>
>
> java.lang.NullPointerException
> at 
> org.apache.hadoop.hive.metastore.utils.IncrementalObjectSizeEstimator$ObjectEstimator.estimateArrayElements(IncrementalObjectSizeEstimator.java:501)
>  ~[hive-metastore-2.3.5.jar:2.3.5]
> at 
> org.apache.hadoop.hive.metastore.utils.IncrementalObjectSizeEstimator$ObjectEstimator.estimate(IncrementalObjectSizeEstimator.java:443)
>  ~[hive-metastore-2.3.5.jar:2.3.5]
> at 
> org.apache.hadoop.hive.metastore.utils.IncrementalObjectSizeEstimator$ObjectEstimator.estimate(IncrementalObjectSizeEstimator.java:433)
>  ~[hive-metastore-2.3.5.jar:2.3.5]
> at 
> org.apache.hadoop.hive.metastore.utils.IncrementalObjectSizeEstimator$ObjectEstimator.estimate(IncrementalObjectSizeEstimator.java:369)
>  ~[hive-metastore-2.3.5.jar:2.3.5]
> at 
> org.apache.hadoop.hive.metastore.cached.SharedCache.populateTableInCache(SharedCache.java:1028)
>  ~[hive-metastore-2.3.5.jar:2.3.5]
> at 
> org.apache.hadoop.hive.metastore.cached.CachedStore.prewarm(CachedStore.java:314)
>  ~[hive-metastore-2.3.5.jar:2.3.5]
> at 
> org.apache.hadoop.hive.metastore.cached.CachedStore$CacheUpdateMasterWork.run(CachedStore.java:492)
>  [hive-metastore-2.3.5.jar:2.3.5]
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) 
> [?:1.7.0_40]
> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304) 
> [?:1.7.0_40]
> at 
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)
>  [?:1.7.0_40]
> at 
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
>  [?:1.7.0_40]
> at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>  [?:1.7.0_40]
> at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>  [?:1.7.0_40]
> at java.lang.Thread.run(Thread.java:724) [?:1.7.0_40]
> *reason:*
> Methods estimateArrayElements throw NPE
> I found that the last class does not appear in the parent (HashMap<Class<?>, 
> Object Estimator> ), and the parent does not contain the information of the 
> ConcurrentHashMap Class.
> The solution is to initialize the class information before using it.



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