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https://issues.apache.org/jira/browse/DRILL-8482?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17822730#comment-17822730
]
ASF GitHub Bot commented on DRILL-8482:
---------------------------------------
shfshihuafeng commented on PR #2885:
URL: https://github.com/apache/drill/pull/2885#issuecomment-1974124079
@cgivre yes , when hbase region are distributed as follows , you select *
from table , we do not get result.
```
NavigableMap<HRegionInfo,ServerName> regionsToScan = Maps.newTreeMap();
regionsToScan.put(new HRegionInfo(TABLE_NAME, splits[0], splits[1]),
SERVER_A);
regionsToScan.put(new HRegionInfo(TABLE_NAME, splits[1], splits[2]),
SERVER_A);
regionsToScan.put(new HRegionInfo(TABLE_NAME, splits[2], splits[3]),
SERVER_B);
regionsToScan.put(new HRegionInfo(TABLE_NAME, splits[3], splits[4]),
SERVER_B);
regionsToScan.put(new HRegionInfo(TABLE_NAME, splits[6], splits[7]),
SERVER_D);
regionsToScan.put(new HRegionInfo(TABLE_NAME, splits[7], splits[8]),
SERVER_D);
regionsToScan.put(new HRegionInfo(TABLE_NAME, splits[8], splits[9]),
SERVER_D);
regionsToScan.put(new HRegionInfo(TABLE_NAME, splits[9], splits[10]),
SERVER_D);
final List endpoints = Lists.newArrayList();
endpoints.add(DrillbitEndpoint.newBuilder().setAddress(HOST_A).setControlPort(1234).build());
endpoints.add(DrillbitEndpoint.newBuilder().setAddress(HOST_B).setControlPort(1234).build());
endpoints.add(DrillbitEndpoint.newBuilder().setAddress(HOST_C).setControlPort(1234).build());
```
> Assign region throw exception when some region is deployed on affinity node
> and some on non-affinity node
> ---------------------------------------------------------------------------------------------------------
>
> Key: DRILL-8482
> URL: https://issues.apache.org/jira/browse/DRILL-8482
> Project: Apache Drill
> Issue Type: Bug
> Components: Storage - HBase
> Affects Versions: 1.21.1
> Reporter: shihuafeng
> Priority: Major
> Fix For: 1.22.0
>
> Attachments:
> 0001-DRILL-8482-Assign-region-throw-exception-when-some-r.patch
>
>
> *[^0001-DRILL-8482-Assign-region-throw-exception-when-some-r.patch]Describe
> the bug*
> Assign region throw exception when some region is deployed on affinity
> node and some on non-affinity node。
> *To Reproduce*
> Steps to reproduce the behavior:
> #
> {code:java}
> NavigableMap<HRegionInfo,ServerName> regionsToScan = Maps.newTreeMap();
> regionsToScan.put(new HRegionInfo(TABLE_NAME, splits[0], splits[1]),
> SERVER_A);
> regionsToScan.put(new HRegionInfo(TABLE_NAME, splits[1], splits[2]),
> SERVER_A);
> regionsToScan.put(new HRegionInfo(TABLE_NAME, splits[2], splits[3]),
> SERVER_B);
> regionsToScan.put(new HRegionInfo(TABLE_NAME, splits[3], splits[4]),
> SERVER_B);
> regionsToScan.put(new HRegionInfo(TABLE_NAME, splits[6], splits[7]),
> SERVER_D);
> regionsToScan.put(new HRegionInfo(TABLE_NAME, splits[7], splits[8]),
> SERVER_D);
> regionsToScan.put(new HRegionInfo(TABLE_NAME, splits[8], splits[9]),
> SERVER_D);
> regionsToScan.put(new HRegionInfo(TABLE_NAME, splits[9], splits[10]),
> SERVER_D);
> final List<DrillbitEndpoint> endpoints = Lists.newArrayList();
> endpoints.add(DrillbitEndpoint.newBuilder().setAddress(HOST_A).setControlPort(1234).build());
> endpoints.add(DrillbitEndpoint.newBuilder().setAddress(HOST_B).setControlPort(1234).build());
> endpoints.add(DrillbitEndpoint.newBuilder().setAddress(HOST_C).setControlPort(1234).build());
> HBaseGroupScan scan = new HBaseGroupScan();
> scan.setRegionsToScan(regionsToScan);
> scan.setHBaseScanSpec(new HBaseScanSpec(TABLE_NAME_STR, splits[0], splits[0],
> null));
> scan.applyAssignments(endpoints);{code}
> *Expected behavior*
> A has 3 regions
> B has 2 regions
> C has 3 regions
> *Error detail, log output or screenshots*
> {code:java}
> Caused by: java.lang.NullPointerException: null
> at
> org.apache.drill.exec.store.hbase.HBaseGroupScan.applyAssignments(HBaseGroupScan.java:283){code}
>
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