fb988373c1
HBASE-27401 Clean up current broken 'n's in our javadoc ( #4812 )
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Signed-off-by: Andrew Purtell <apurtell@apache.org>
(cherry picked from commit 63cdd026f0
2022-10-06 23:01:14 +08:00
9c3528d730
HBASE-27220 Apply the spotless format change in HBASE-27208 to our code base
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Signed-off-by: Andrew Purtell <apurtell@apache.org>
2022-07-19 10:03:26 +08:00
baddedf783
HBASE-23330: Fix delegation token fetch with MasterRegistry ( #1084 ) ( #4598 )
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Signed-off-by: Andrew Purtell <apurtell@apache.org>
(cherry picked from commit d8b3f55518
2022-07-06 11:54:00 +08:00
b47ca399c5
HBASE-27141 Upgrade hbase-thirdparty dependency to 4.1.1 ( #4552 )
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Signed-off-by: Andrew Purtell <apurtell@apache.org>
Signed-off-by: Pankaj Kumar <pankajkumar@apache.org>
(cherry picked from commit 9bae50f83c
2022-06-22 23:19:10 +08:00
53b57d686b
HBASE-27028 Add a shell command for flushing master local region ( #4539 )
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Signed-off-by: Duo Zhang <zhangduo@apache.org>
(cherry picked from commit 666aa064e7
2022-06-21 13:35:38 +08:00
b83e03abc2
HBASE-27027 Use jetty SslContextFactory.Server instead of deprecated SslContextFactory ( #4425 )
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Signed-off-by: Duo Zhang <zhangduo@apache.org>
(cherry picked from commit 1be2c83b3d
2022-05-22 11:36:05 +08:00
1aea663c6d
HBASE-26899 Run spotless:apply
2022-05-01 22:52:40 +08:00
6c43e62163
HBASE-26587 Introduce a new Admin API to change SFT implementation ( #4030 ) ( #4080 )
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Signed-off-by: Wellington Ramos Chevreuil <wchevreuil@apache.org>
Reviewed-by: Josh Elser <elserj@apache.org>
2022-03-26 09:30:58 -07:00
16ad5f777d
HBASE-26286: Add support for specifying store file tracker when restoring or cloning snapshot
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Closes #3851
Signed-off-by: Duo Zhang <zhangduo@apache.org>
Signed-off-by: Josh Elser <elserj@apache.org>
2022-03-26 09:30:58 -07:00
7906703569
HBASE-26175 MetricsHBaseServer should record all kinds of Exceptions ( #4248 )
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Signed-off-by: Pankaj Kumar <pankajkumar@apache.org>
2022-03-24 19:10:07 +08:00
d971a9d298
HBASE-26622 Update error-prone to 2.10
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Author: Mike Drob <mdrob@apache.org>
Co-authored-by: Nick Dimiduk <ndimiduk@apache.org>
Signed-off-by: Andrew Purtell <apurtell@apache.org>
2022-03-03 11:52:00 +01:00
9059f90ca3
HBASE-26629 Add expiration for long time vacant scanners in Thrift2 ( #3984 )
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Signed-off-by: Duo Zhang <zhangduo@apache.org>
2022-01-02 21:27:46 +08:00
0001ad6b8b
HBASE-26623 Report CallDroppedException in exception metrics ( #3980 )
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`CallDroppedException` can be thrown with `CallRunner.drop()` by queue implementations that decide to drop calls to groom the RPC call backlog. The LifoCoDel queue does this I believe and with Pluggable queue it's possible for 3rd party queue implementations to be using `drop()` for similar reasons. It would be nice for the server to be tracking these exceptions in metrics since otherwise you might have to do some extra lifting on the client side.
Signed-off-by: Duo Zhang <zhangduo@apache.org>
Reviewed-by: Bryan Beaudreault <bbeaudreault@hubspot.com>
2021-12-30 00:05:12 +08:00
be9877efdc
HBASE-26364 TestThriftServer is failing 100% in our flaky test job ( #3759 )
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Signed-off-by: Xiaolin Ha <haxiaolin@apache.org>
Signed-off-by: Duo Zhang <zhangduo@apache.org>
(cherry picked from commit 4454c2f909
2021-10-18 14:46:31 +01:00
6d0777a551
HBASE-26284 Add HBase Thrift API to get all table names along with wh… ( #3693 ) ( #3745 )
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Signed-off-by: Wellington Chevreuil <wchevreuil@apache.org>
2021-10-18 10:06:32 +01:00
e07928df4c
HBASE-26147 Add a dry run mode to the balancer, where moves are calculated but not actually executed
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Signed-off-by: Duo Zhang <zhangduo@apache.org>
Signed-off-by: Josh Elser <elserj@apache.org>
(Re-application of HBASE-26147 with the correct author metadata)
2021-09-01 21:58:30 -04:00
1e74f08403
Revert "HBASE-26147 Add a dry run mode to the balancer, where moves are calculated but not actually executed"
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This reverts commit 5b58d11c91
2021-09-01 21:57:46 -04:00
5b58d11c91
HBASE-26147 Add a dry run mode to the balancer, where moves are calculated but not actually executed
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Signed-off-by: Duo Zhang <zhangduo@apache.org>
Signed-off-by: Josh Elser <elserj@apache.org
2021-09-01 21:47:53 -04:00
aa3b07f6bb
HBASE-26154: Adds exception metrics for QuotaExceededException and RpcThrottlingException ( #3544 )
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Signed-off-by: Xiaolin Ha <haxiaolin@apache.org>
Signed-off-by: Pankaj Kumar<pankajkumar@apache.org>
2021-08-02 09:51:34 +05:30
84ae6185b8
HBASE-26025 Add a flag to mark if the IOError can be solved by retry in thrift IOError ( #3416 )
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Signed-off-by: Reid Chan <reidchan@apache.org>
2021-06-25 16:44:22 +08:00
d22bd9057e
HBASE-25987 Make SSL keystore type configurable for HBase ThriftServer ( #3367 )
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Signed-off-by: Wellington Chevreuil <wchevreuil@apache.com>
(cherry picked from commit 7f7a293cb5
2021-06-09 16:57:01 +01:00
51a6aed72e
HBASE-25930 Thrift does not support requests in Kerberos environment ( #3326 )
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Co-authored-by: sunhaoning <sunhaoning@qianxin.com>
Signed-off-by: Istvan Toth <stoty@apache.org>
Signed-off-by: Balazs Meszaros <meszibalu@apache.org>
2021-06-04 08:17:17 +02:00
a4e8ee183e
HBASE-25911 Replace calls to System.currentTimeMillis with EnvironmentEdgeManager.currentTime ( #3302 )
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We introduced EnvironmentEdgeManager as a way to inject alternate clocks
for unit tests. In order for this to be effective, all callers that would
otherwise use System.currentTimeMillis() must call
EnvironmentEdgeManager.currentTime() instead, except the implementers of
EnvironmentEdge.
Signed-off-by: Bharath Vissapragada <bharathv@apache.org>
Signed-off-by: Duo Zhang <zhangduo@apache.org>
Signed-off-by: Viraj Jasani <vjasani@apache.org>
Conflicts:
hbase-backup/src/main/java/org/apache/hadoop/hbase/backup/impl/BackupManager.java
hbase-backup/src/test/java/org/apache/hadoop/hbase/backup/TestBackupBase.java
hbase-backup/src/test/java/org/apache/hadoop/hbase/backup/TestBackupManager.java
hbase-backup/src/test/java/org/apache/hadoop/hbase/backup/TestBackupSystemTable.java
hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestAsyncConnectionTracing.java
hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestAsyncRegionLocatorTracing.java
hbase-it/src/test/java/org/apache/hadoop/hbase/IntegrationTestBackupRestore.java
hbase-it/src/test/java/org/apache/hadoop/hbase/IntegrationTestManyRegions.java
hbase-it/src/test/java/org/apache/hadoop/hbase/chaos/actions/MoveRegionsOfTableAction.java
hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestWALRecordReader.java
hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/replication/TestVerifyReplicationCrossDiffHdfs.java
hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/snapshot/TestExportSnapshotV1NoCluster.java
hbase-rsgroup/src/test/java/org/apache/hadoop/hbase/rsgroup/TestEnableRSGroups.java
hbase-rsgroup/src/test/java/org/apache/hadoop/hbase/rsgroup/TestRSGroupsAdmin2.java
hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/CallRunner.java
hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/SimpleRpcServer.java
hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
hbase-server/src/main/java/org/apache/hadoop/hbase/master/ServerManager.java
hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/RegionStateStore.java
hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/SimpleLoadBalancer.java
hbase-server/src/main/java/org/apache/hadoop/hbase/wal/AbstractWALRoller.java
hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java
hbase-server/src/test/java/org/apache/hadoop/hbase/MiniHBaseCluster.java
hbase-server/src/test/java/org/apache/hadoop/hbase/TestMetaTableAccessor.java
hbase-server/src/test/java/org/apache/hadoop/hbase/TestMetaUpdatesGoToPriorityQueue.java
hbase-server/src/test/java/org/apache/hadoop/hbase/TestSerialization.java
hbase-server/src/test/java/org/apache/hadoop/hbase/backup/TestHFileArchiving.java
hbase-server/src/test/java/org/apache/hadoop/hbase/client/RestoreSnapshotFromClientSimpleTestBase.java
hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestAdmin2.java
hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestConnection.java
hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSide3.java
hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestMobCloneSnapshotFromClientCloneLinksAfterDelete.java
hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestMutationGetCellBuilder.java
hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSnapshotMetadata.java
hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestActiveMasterManager.java
hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestMasterMetricsWrapper.java
hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestMetaAssignmentWithStopMaster.java
hbase-server/src/test/java/org/apache/hadoop/hbase/master/assignment/TestRegionStateStore.java
hbase-server/src/test/java/org/apache/hadoop/hbase/master/cleaner/TestLogsCleaner.java
hbase-server/src/test/java/org/apache/hadoop/hbase/master/cleaner/TestReplicationHFileCleaner.java
hbase-server/src/test/java/org/apache/hadoop/hbase/master/janitor/TestCatalogJanitor.java
hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/MasterProcedureSchedulerPerformanceEvaluation.java
hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestCloneSnapshotProcedure.java
hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestRestoreSnapshotProcedure.java
hbase-server/src/test/java/org/apache/hadoop/hbase/procedure2/store/region/RegionProcedureStorePerformanceEvaluation.java
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegionInfo.java
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegionServerBulkLoad.java
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHStoreFile.java
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMajorCompaction.java
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionOpen.java
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestSimpleTimeRangeTracker.java
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestWideScanner.java
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/compactions/TestCloseChecker.java
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/AbstractTestProtobufLog.java
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/AbstractTestWALReplay.java
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestCombinedAsyncWriter.java
hbase-server/src/test/java/org/apache/hadoop/hbase/replication/master/TestRecoverStandbyProcedure.java
hbase-server/src/test/java/org/apache/hadoop/hbase/snapshot/TestFlushSnapshotFromClient.java
hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestSyncReplicationWALProvider.java
hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/TestThriftServer.java
hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/MiniZooKeeperCluster.java
2021-06-01 12:41:15 -07:00
375aee2327
HBASE-25817 Memory leak from thrift server hashMap ( #3257 )
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Use GuavaCache in thrift server hashmap
Signed-off-by: Michael Stack <stack@apache.org>
2021-05-22 10:51:09 +08:00
9a84267748
HBASE-25568 Upgrade Thrift jar to fix CVE-2020-13949 ( #3083 )
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Signed-off-by: stack <stack@apache.com>
Signed-off-by: Duo Zhang <zhangduo@apache.org>
2021-03-26 09:33:02 +05:30
3775464981
HBASE-25242 Add Increment/Append support to RowMutations ( #2711 )
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Signed-off-by: Duo Zhang <zhangduo@apache.org>
Signed-off-by: Andrew Purtell <apurtell@apache.org>
2020-11-27 03:53:19 +09:00
1b6399a480
HBASE-24640 [branch-2] Purge use of VisibleForTesting ( #2696 )
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Signed-off-by: Nick Dimiduk <ndimiduk@apache.org>
2020-11-25 14:15:32 -08:00
5ce3e3e12c
HBASE-24268 REST and Thrift server do not handle the "doAs" parameter case insensitively
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Closes #1843
Signed-off-by: Josh Elser <elserj@apache.org>
Signed-off-by: Sean Busbey <busbey@apache.org>
2020-11-24 12:25:46 -05:00
e8ecf2e016
HBASE-25261 Upgrade Bootstrap to 3.4.1
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HBase UI is currently using in bootstrap 3.3.7. This version is vulnerable to 4
medium CVEs (CVE-2018-14040, CVE-2018-14041, CVE-2018-14042, and CVE-2019-8331).
Details on all the bootstrap versions and vulnerabilities is
here: https://snyk.io/vuln/npm:bootstrap
Upgrading to bootstrap 4 would be nice, but potentially more work to do. We
should at least upgrade to the latest bootstrap 3, which is 3.4.1 currently.
closes #2661
Signed-off-by: Wellington Chevreuil <wchevreuil@apache.org>
Signed-off-by: Peter Somogyi <psomogyi@apache.org>
2020-11-17 17:15:57 +01:00
dd6974fda8
HBASE-24875 Remove the force param for unassign since it dose not take effect any more ( #2254 )
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Modified compared to main branch to deprecate obviated MasterObserver interface methods instead of remove them.
Signed-off-by: Sean Busbey <busbey@apache.org>
(cherry picked from commit c5ca191921
2020-10-13 16:29:03 -05:00
b2f2c79d8f
HBASE-25079 Upgrade Bootstrap to 3.3.7 ( #2442 )
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Signed-off-by: Viraj Jasani<virajjasani@apache.org>
2020-09-23 14:57:42 -07:00
4316dc738c
HBASE-24528 : BalancerDecision queue implementation in HMaster with Admin API ( #2411 )
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* Admin API getLogEntries() for ring buffer use-cases: so far, provides balancerDecision and slowLogResponse
* Refactor RPC call for similar use-cases
* Single RPC API getLogEntries() for both Master.proto and Admin.proto
Closes #2261
Signed-off-by: Andrew Purtell <apurtell@apache.org>
2020-09-17 18:51:42 +05:30
7a3bb8aefe
HBASE-25037 Lots of thread pool are changed to non daemon after HBASE-24750 which causes trouble when shutting down ( #2407 )
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Signed-off-by: Viraj Jasani <vjasani@apache.org>
2020-09-16 22:03:42 +08:00
ea4c7aad68
HBASE-24971 Upgrade JQuery to 3.5.1 ( #2336 )
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- Update embedded minimized jquery to 3.5.1
- Update embedded minimized jquery.tablesorter to 2.31.3
Signed-off-by: Viraj Jasani <vjasani@apache.org>
2020-09-01 10:40:18 -07:00
4455856e9c
HBASE-23834 HBase fails to run on Hadoop 3.3.0/3.2.2/3.1.4 due to jetty version mismatch ( #2222 )
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Signed-off-by: Viraj Jasani <vjasani@apache.org>
Signed-off-by: Josh Elser <elserj@apache.org>
Signed-off-by: Peter Somogyi <psomogyi@apache.org>
2020-08-25 15:02:55 +08:00
4667a971b1
HBASE-24912 Enlarge MemstoreFlusherChore/CompactionChecker period for unit test ( #2285 )
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Signed-off-by: stack <stack@apache.org>
2020-08-21 12:42:11 +08:00
acfa08cd87
HBASE-24627 Normalize one table at a time
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Introduce an additional method to our Admin interface that allow an
operator to selectivly run the normalizer. The IPC protocol supports
general table name select via compound filter.
Signed-off-by: Sean Busbey <busbey@apache.org>
Signed-off-by: Viraj Jasani <vjasani@apache.org>
2020-08-19 09:22:21 -07:00
8ccf643fdc
HBASE-24750 : All ExecutorService should use guava ThreadFactoryBuilder ( #2214 )
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Closes #2196
Signed-off-by: Nick Dimiduk <ndimiduk@apache.org>
Signed-off-by: Ted Yu <tyu@apache.org>
Signed-off-by: niuyulin <nyl353@163.com>
2020-08-12 15:57:53 +05:30
ebf493f075
HBASE-24694 Support flush a single column family of table ( #2218 )
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Signed-off-by: Wellington Chevreuil <wchevreuil@apache.org>
2020-08-10 10:36:13 +01:00
1c45c8c7db
HBASE-24404 Support flush a single column family of region ( #2098 )
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Signed-off-by: Wellington Chevreuil <wchevreuil@apache.org>
2020-07-31 09:31:14 +01:00
ce4e692699
HBASE-24718 : Generic NamedQueue framework for multiple use-cases (Refactor SlowLog responses) ( #2110 )
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Closes #2052
Signed-off-by: Wellington Chevreuil <wchevreuil@apache.org>
2020-07-22 11:36:19 +05:30
3c91c33452
HBASE-24696 Include JVM information on Web UI under "Software Attributes"
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Closes #2087
Signed-off-by: Viraj Jasani <vjasani@apache.org>
Signed-off-by: Nick Dimiduk <ndimiduk@apache.org>
2020-07-21 16:55:44 +05:30
f771fd26b4
HBASE-24650 Change the return types of the new checkAndMutate methods introduced in HBASE-8458 ( #2033 )
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Signed-off-by: Duo Zhang <zhangduo@apache.org>
2020-07-08 08:00:48 +09:00
8b45b0c787
HBASE-24547 : Thrift support for HBASE-23941 (Operator support for get_slowlog_responses API) ( #1892 )
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Signed-off-by: Bharath Vissapragada <bharathv@apache.org>
2020-06-15 15:47:53 +05:30
6ff6fe49a3
HBASE-8458 Support for batch version of checkAndMutate() ( #1897 )
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Signed-off-by: Josh Elser <elserj@apache.org>
2020-06-14 13:55:06 +09:00
528e9d6454
HBASE-24307 [Flakey Tests] krb server for secure thrift tests throws BindException ( #1656 )
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Move the random free port generate back into hbasecommontestingutility
from hbasetestingutility.
Add a create simple kdc server utility that will start a kdc server and
if a bindexception, create a new one on a new random port in hbase-common.
Add new BoundSocketMaker helpful when trying to manufacture
BindExceptions because of port clash.
Change thrift and http kdc tests to use this new utility (removes
code duplication around kdc server setup).
2020-05-05 21:08:09 -07:00
4cd893ad47
HBASE-24294 [Flakey Tests] TestThriftHttpServer BindException ( #1619 )
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Refactor Thrift tests so resilient when launch of ThriftServer runs
into BindException.
hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/TestBindExceptionHandling.java
hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/TestThriftHttpServer.java
hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/TestThriftServerCmdLine.java
hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift2/TestThrift2HttpServer.java
hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift2/TestThrift2ServerCmdLine.java
Refactor to use new ThriftServerRunner and ThriftServerSupplier
hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/TestThriftServer.java
Log list of existing tables on assert.
hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/TestThriftSpnegoHttpFallbackServer.java
hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/TestThriftSpnegoHttpServer.java
Add Ignore for testRunThriftServerWithHeaderBufferLength. Its tested in
superclass. No need to test again here. Besides, its destructive test
leaving behind dregs that mess up the retry.
hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/ThriftServerRunner.java
Utility. Thread to host ThriftServer and exception if one after run
completes.
2020-05-01 08:38:44 -07:00
3b0812d3e1
HBASE-24215 [Flakey Tests] [ERROR] TestSecureRESTServer java.lang.NoClassDefFoundError: com/sun/jersey/core/spi/factory/AbstractRuntimeDelegate
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Addendum #2 : Add jersey-servlet to hadoop3 profile.
2020-04-28 20:18:31 -07:00
8a1ffa6c43
HBASE-24220 Allow that zk NOTEMPTY multi exception is retryable by running in-series
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hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableRecordReaderImpl.java
hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TableRecordReaderImpl.java
Cleanup checkstyle warnings. Don't depend on hbase-client
ScannerCallable.
hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/snapshot/TestExportSnapshot.java
Cut down on cluster resource usage.
hbase-server/src/test/java/org/apache/hadoop/hbase/master/AbstractTestDLS.java
Debug
hbase-server/src/test/java/org/apache/hadoop/hbase/security/access/TestAccessController3.java
Debug
hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/TestThriftHttpServer.java
Debug
hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/MiniZooKeeperCluster.java
Debug
hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKUtil.java
Allow that NONEMPTY is retryable by running in series.
2020-04-20 15:43:09 -07:00
66a329e4b7
HBASE-24148: Upgrade Thrift to 0.13.0: 0.12.0 has outstanding CVEs.
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Upgrade thrift from 0.12 to 0.13.
2020-04-15 22:40:57 -07:00
Duo Zhang
LiangJun He
bitterfox
BukrosSzabolcs
Xiaolin Ha
Mike Drob
Yutong Xiao
Richard Marscher
Wellington Ramos Chevreuil
Horváth Dóra
Bryan Beaudreault
Josh Elser
Mate Szalay-Beko
Haoning Sun
Andrew Purtell
sambong0113
Pankaj
Toshihiro Suzuki
Richard Antal
Mate Szalay-Beko
bsglz
Viraj Jasani
Guanghao Zhang
Nick Dimiduk
Mingliang Liu
Michael Stack
stack
Tamas Penzes