[ 
https://issues.apache.org/jira/browse/HDFS-16578?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Hong Chen updated HDFS-16578:
-----------------------------
    Description: 
There is no missing blocks at NN1(ann), after NN2 has transitioned to active 
state by stopping zkfc at NN1, we have found some missing blocks at NN2.
{panel:title=Exception}
hadoop fs -get /user/xxx/d=2020-01-03/000154_0.lzo .
get: Could not obtain block: 
BP-459146894-xxx-1581848181424:{color:#172b4d}blk_1081077638_7337053{color} 
file=/user/xxx/d=2020-01-03/000154_0.lzo 
{panel}
{panel:title=/user/xxx/d=2020-01-03/000154_0.lzo file fscklog at NN1}
/user/xxx/d=2020-01-03/000154_0.lzo 1555552 bytes, 1 block(s):  OK
0. BP-459146894-xxx-1581848181424:{color:#172b4d}blk_1081077638_7337053{color} 
len=1555552 {color:#172b4d}Live_repl=2{color} 
DatanodeInfoWithStorage[{color:#172b4d}datanode1{color}:1004,DS-3236bdbc-8af9-4d3a-8bc8-c921b3a8862b,DISK]],
 
[DatanodeInfoWithStorage[{color:#172b4d}datanode2{color}:1004,DS-84b0a3be-5aec-4850-ba71-ed348b94e7c0,DISK]

Status: HEALTHY
 Total size:    1555552 B
 Total dirs:    0
 Total files:    1
 Total symlinks:        0
 Total blocks (validated):    1 (avg. block size 1555552 B)
 Minimally replicated blocks:    1 (100.0 %)
 Over-replicated blocks:    0 (0.0 %)
 Under-replicated blocks:    0 (0.0 %)
 Mis-replicated blocks:        0 (0.0 %)
 Default replication factor:    3
 Average block replication:    2.0
 Corrupt blocks:        0
 Missing replicas:        0 (0.0 %)
 Number of data-nodes:        2400
 Number of racks:        90
FSCK ended at Thu May 12 17:50:37 CST 2022 in 49 milliseconds
{panel}
then we we check the {color:#172b4d}blk_1081077638_7337053{color} in datanodes 
log
{panel:title=datanode1}
2022-05-10 12:00:42,984 [12699841344] - INFO  [BP-459146894-xxx-1581848181424 
heartbeating to xxx/xxx:8021:FsDatasetAsyncDiskService@217] - Scheduling 
{color:#172b4d}blk_1081077638_7337053{color} file 
/mnt/dfs/9/data/current/BP-459146894-xxx-1581848181424/current/finalized/subdir15/subdir15/blk_1081077638
 for deletion
2022-05-10 12:00:44,409 [12699842769] - INFO  [Async disk worker #46179 for 
volume 
/mnt/dfs/9/data/current:FsDatasetAsyncDiskService$ReplicaFileDeleteTask@321] - 
Deleted BP-459146894-xxx-1581848181424 blk_1081077638_7337053 file 
/mnt/dfs/9/data/current/BP-459146894-xxx-1581848181424/current/finalized/subdir15/subdir15/blk_1081077638
{panel}
{panel:title=datanode2}
2021-11-29 16:27:07,411 [2765933340] - INFO  [BP-459146894-xxx-1581848181424 
heartbeating to xxx/xxx:8021:FsDatasetAsyncDiskService@217] - Scheduling 
{color:#172b4d}blk_1081077638_7337053{color} file 
/mnt/dfs/5/data/current/BP-459146894-xxx-1581848181424/current/finalized/subdir15/subdir15/blk_1081077638
 for deletion
2021-11-29 16:27:08,587 [2765934516] - INFO  [Async disk worker #10145 for 
volume 
/mnt/dfs/5/data/current:FsDatasetAsyncDiskService$ReplicaFileDeleteTask@321] - 
Deleted BP-459146894-xxx-1581848181424 blk_1081077638_7337053 file 
/mnt/dfs/5/data/current/BP-459146894-xxx-1581848181424/current/finalized/subdir15/subdir15/blk_1081077638
{panel}

  was:
There is no missing blocks at NN1(ann), after NN2 has transitioned to active 
state by stopping zkfc at NN1 manually. we have found some missing blocks at 
NN2.
{panel:title=/user/xxx/d=2020-01-03/000154_0.lzo file fscklog at NN1}
/user/xxx/d=2020-01-03/000154_0.lzo 1555552 bytes, 1 block(s):  OK
0. BP-459146894-xxx-1581848181424:{color:#172b4d}blk_1081077638_7337053{color} 
len=1555552 {color:#172b4d}Live_repl=2{color} 
DatanodeInfoWithStorage[{color:#172b4d}datanode1{color}:1004,DS-3236bdbc-8af9-4d3a-8bc8-c921b3a8862b,DISK]],
 
[DatanodeInfoWithStorage[{color:#172b4d}datanode2{color}:1004,DS-84b0a3be-5aec-4850-ba71-ed348b94e7c0,DISK]

Status: HEALTHY
 Total size:    1555552 B
 Total dirs:    0
 Total files:    1
 Total symlinks:        0
 Total blocks (validated):    1 (avg. block size 1555552 B)
 Minimally replicated blocks:    1 (100.0 %)
 Over-replicated blocks:    0 (0.0 %)
 Under-replicated blocks:    0 (0.0 %)
 Mis-replicated blocks:        0 (0.0 %)
 Default replication factor:    3
 Average block replication:    2.0
 Corrupt blocks:        0
 Missing replicas:        0 (0.0 %)
 Number of data-nodes:        2400
 Number of racks:        90
FSCK ended at Thu May 12 17:50:37 CST 2022 in 49 milliseconds
{panel}
then we we check the {color:#172b4d}blk_1081077638_7337053{color} in datanodes 
log
{panel:title=datanode1}
2022-05-10 12:00:42,984 [12699841344] - INFO  [BP-459146894-xxx-1581848181424 
heartbeating to xxx/xxx:8021:FsDatasetAsyncDiskService@217] - Scheduling 
{color:#172b4d}blk_1081077638_7337053{color} file 
/mnt/dfs/9/data/current/BP-459146894-xxx-1581848181424/current/finalized/subdir15/subdir15/blk_1081077638
 for deletion
2022-05-10 12:00:44,409 [12699842769] - INFO  [Async disk worker #46179 for 
volume 
/mnt/dfs/9/data/current:FsDatasetAsyncDiskService$ReplicaFileDeleteTask@321] - 
Deleted BP-459146894-xxx-1581848181424 blk_1081077638_7337053 file 
/mnt/dfs/9/data/current/BP-459146894-xxx-1581848181424/current/finalized/subdir15/subdir15/blk_1081077638
{panel}
{panel:title=datanode2}
2021-11-29 16:27:07,411 [2765933340] - INFO  [BP-459146894-xxx-1581848181424 
heartbeating to xxx/xxx:8021:FsDatasetAsyncDiskService@217] - Scheduling 
{color:#172b4d}blk_1081077638_7337053{color} file 
/mnt/dfs/5/data/current/BP-459146894-xxx-1581848181424/current/finalized/subdir15/subdir15/blk_1081077638
 for deletion
2021-11-29 16:27:08,587 [2765934516] - INFO  [Async disk worker #10145 for 
volume 
/mnt/dfs/5/data/current:FsDatasetAsyncDiskService$ReplicaFileDeleteTask@321] - 
Deleted BP-459146894-xxx-1581848181424 blk_1081077638_7337053 file 
/mnt/dfs/5/data/current/BP-459146894-xxx-1581848181424/current/finalized/subdir15/subdir15/blk_1081077638
{panel}
{panel:title=Exception}
hadoop fs -get /user/xxx/d=2020-01-03/000154_0.lzo .
get: Could not obtain block: 
BP-459146894-xxx-1581848181424:{color:#172b4d}blk_1081077638_7337053{color} 
file=/user/xxx/d=2020-01-03/000154_0.lzo 
{panel}


> Missing blocks appeared after snn has transitioned to active state 
> -------------------------------------------------------------------
>
>                 Key: HDFS-16578
>                 URL: https://issues.apache.org/jira/browse/HDFS-16578
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode, namenode
>    Affects Versions: 2.9.2
>            Reporter: Hong Chen
>            Priority: Critical
>
> There is no missing blocks at NN1(ann), after NN2 has transitioned to active 
> state by stopping zkfc at NN1, we have found some missing blocks at NN2.
> {panel:title=Exception}
> hadoop fs -get /user/xxx/d=2020-01-03/000154_0.lzo .
> get: Could not obtain block: 
> BP-459146894-xxx-1581848181424:{color:#172b4d}blk_1081077638_7337053{color} 
> file=/user/xxx/d=2020-01-03/000154_0.lzo 
> {panel}
> {panel:title=/user/xxx/d=2020-01-03/000154_0.lzo file fscklog at NN1}
> /user/xxx/d=2020-01-03/000154_0.lzo 1555552 bytes, 1 block(s):  OK
> 0. 
> BP-459146894-xxx-1581848181424:{color:#172b4d}blk_1081077638_7337053{color} 
> len=1555552 {color:#172b4d}Live_repl=2{color} 
> DatanodeInfoWithStorage[{color:#172b4d}datanode1{color}:1004,DS-3236bdbc-8af9-4d3a-8bc8-c921b3a8862b,DISK]],
>  
> [DatanodeInfoWithStorage[{color:#172b4d}datanode2{color}:1004,DS-84b0a3be-5aec-4850-ba71-ed348b94e7c0,DISK]
> Status: HEALTHY
>  Total size:    1555552 B
>  Total dirs:    0
>  Total files:    1
>  Total symlinks:        0
>  Total blocks (validated):    1 (avg. block size 1555552 B)
>  Minimally replicated blocks:    1 (100.0 %)
>  Over-replicated blocks:    0 (0.0 %)
>  Under-replicated blocks:    0 (0.0 %)
>  Mis-replicated blocks:        0 (0.0 %)
>  Default replication factor:    3
>  Average block replication:    2.0
>  Corrupt blocks:        0
>  Missing replicas:        0 (0.0 %)
>  Number of data-nodes:        2400
>  Number of racks:        90
> FSCK ended at Thu May 12 17:50:37 CST 2022 in 49 milliseconds
> {panel}
> then we we check the {color:#172b4d}blk_1081077638_7337053{color} in 
> datanodes log
> {panel:title=datanode1}
> 2022-05-10 12:00:42,984 [12699841344] - INFO  [BP-459146894-xxx-1581848181424 
> heartbeating to xxx/xxx:8021:FsDatasetAsyncDiskService@217] - Scheduling 
> {color:#172b4d}blk_1081077638_7337053{color} file 
> /mnt/dfs/9/data/current/BP-459146894-xxx-1581848181424/current/finalized/subdir15/subdir15/blk_1081077638
>  for deletion
> 2022-05-10 12:00:44,409 [12699842769] - INFO  [Async disk worker #46179 for 
> volume 
> /mnt/dfs/9/data/current:FsDatasetAsyncDiskService$ReplicaFileDeleteTask@321] 
> - Deleted BP-459146894-xxx-1581848181424 blk_1081077638_7337053 file 
> /mnt/dfs/9/data/current/BP-459146894-xxx-1581848181424/current/finalized/subdir15/subdir15/blk_1081077638
> {panel}
> {panel:title=datanode2}
> 2021-11-29 16:27:07,411 [2765933340] - INFO  [BP-459146894-xxx-1581848181424 
> heartbeating to xxx/xxx:8021:FsDatasetAsyncDiskService@217] - Scheduling 
> {color:#172b4d}blk_1081077638_7337053{color} file 
> /mnt/dfs/5/data/current/BP-459146894-xxx-1581848181424/current/finalized/subdir15/subdir15/blk_1081077638
>  for deletion
> 2021-11-29 16:27:08,587 [2765934516] - INFO  [Async disk worker #10145 for 
> volume 
> /mnt/dfs/5/data/current:FsDatasetAsyncDiskService$ReplicaFileDeleteTask@321] 
> - Deleted BP-459146894-xxx-1581848181424 blk_1081077638_7337053 file 
> /mnt/dfs/5/data/current/BP-459146894-xxx-1581848181424/current/finalized/subdir15/subdir15/blk_1081077638
> {panel}



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