HBASE-24871 Replication may loss data when refresh recovered replicat… #2249
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Add a UT for this case? |
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OK, I'll try it. |
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As @infraio said, it will be great to add an UT to show the issue w/o change. Otherwise, looks good to me. |
huaxiangsun
requested changes
Aug 12, 2020
wchevreuil
reviewed
Aug 13, 2020
| @@ -516,7 +516,7 @@ public void refreshSources(String peerId) throws IOException { | |||
| ReplicationSourceInterface replicationSource = createSource(queueId, peer); | |||
| this.oldsources.add(replicationSource); | |||
| for (SortedSet<String> walsByGroup : walsByIdRecoveredQueues.get(queueId).values()) { | |||
| walsByGroup.forEach(wal -> src.enqueueLog(new Path(wal))); | |||
| walsByGroup.forEach(wal -> replicationSource.enqueueLog(new Path(wal))); | |||
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So the problem is that logs from recovered queues were getting added to the new "normal" queue? And these logs are never read, then?
Nit: maybe worth rename the variable from line #516 from replicationSource to recoveredReplicationSource, for further clarity?
I endorse the call for an additional UT, here.
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So the problem is that logs from recovered queues were getting added to the new "normal" queue? And these logs are never read, then?
Yes. These log will be added to normal source. And will read by normal source. So this should not loss data but only affect the replicate order.
@ddupg I thought the issue title need to be changed.
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Thanks for clarifying, @infraio . Yes, let's change the title, please.
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Thank @wchevreuil @infraio for reviewing. In this case, it will loss data and duplicate data at the same time.
After we added these log to normal source, the normal source replicate the first WAL entries batch and updateLogPosition via zk.
It will successfully replicate first WAL entries batch, but data may be out-of date. And then failed to updateLogPosition in zk, which aborting RS, so we will also loss data.
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Thank @huaxiangsun for reviewing, I've added an UT for this case. |
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Thanks @ddupg. One quick question, will the new UT fail without changes in refreshSources()? Just want to make sure that the UT really does its job. +1 pending on your answer. |
huaxiangsun
approved these changes
Aug 20, 2020
Yes, the UT fail without changes in this patch. Because it failed to updateLogPosition in zk after replicating first WAL edits batch, which aborting RS. |
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@infraio and @wchevreuil, any more comments before I merge the changes? Thanks. |
infraio
reviewed
Aug 22, 2020
| !replication.getReplicationManager().getOldSources().isEmpty()); | ||
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| // disable peer to trigger refreshSources | ||
| hbaseAdmin.disableReplicationPeer(PEER_ID2); |
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Which assert will failed if no this fix?
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The UT will timeout in last UTIL2.waitFor without this fix because of losing data.
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infraio
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Aug 24, 2020
…ion sources (#2249) Signed-off-by: huaxiangsun <huaxiangsun@apache.org> Signed-off-by: Guanghao Zhang <zghao@apache.org> Conflicts: hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSourceManager.java
infraio
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Aug 24, 2020
…ion sources (#2249) Signed-off-by: huaxiangsun <huaxiangsun@apache.org> Signed-off-by: Guanghao Zhang <zghao@apache.org> Conflicts: hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSourceManager.java
infraio
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Aug 24, 2020
…ion sources (#2249) Signed-off-by: huaxiangsun <huaxiangsun@apache.org> Signed-off-by: Guanghao Zhang <zghao@apache.org> Conflicts: hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSourceManager.java Conflicts: hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSourceManager.java
clarax
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Nov 15, 2020
…ion sources (apache#2249) Signed-off-by: huaxiangsun <huaxiangsun@apache.org> Signed-off-by: Guanghao Zhang <zghao@apache.org> Conflicts: hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSourceManager.java
wchevreuil
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May 24, 2021
…ion sources (apache#2249) Signed-off-by: huaxiangsun <huaxiangsun@apache.org> Signed-off-by: Guanghao Zhang <zghao@apache.org> Conflicts: hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSourceManager.java Conflicts: hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSourceManager.java (cherry picked from commit e300ae3) Change-Id: I5b2aa29597811d77ce99732019a2ac3217c93dab
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