Hello, In my clutser (4nodes) I have some blocks that does not meet replication number. I do not fnd any issue. About versions : Clutser installed with ambari HDP 2.3.2.0.2950 HDFS 2.7.1.2.3 Replication factor : 3 Here is the nodename log : 2015-12-31 10:09:33,004 INFO BlockStateChange (UnderReplicatedBlocks.java:chooseUnderReplicatedBlocks(407)) - chooseUnderReplicatedBlocks selected 8 blocks at priority level 2; Total=8 2015-12-31 10:09:33,004 INFO BlockStateChange (BlockManager.java:computeReplicationWorkForBlocks(1522)) - BLOCK* neededReplications = 6848, pendingReplications = 0. 2015-12-31 10:09:33,004 INFO blockmanagement.BlockManager (BlockManager.java:computeReplicationWorkForBlocks(1529)) - Blocks chosen but could not be replicated = 8; of which 8 have no target, 0 have no source, 0 are UC, 0 are abandoned, 0 already have enough replicas. 2015-12-31 10:09:36,005 INFO BlockStateChange (UnderReplicatedBlocks.java:chooseUnderReplicatedBlocks(407)) - chooseUnderReplicatedBlocks selected 8 blocks at priority level 2; Total=8 2015-12-31 10:09:36,005 INFO BlockStateChange (BlockManager.java:computeReplicationWorkForBlocks(1522)) - BLOCK* neededReplications = 6848, pendingReplications = 0. 2015-12-31 10:09:36,005 INFO blockmanagement.BlockManager (BlockManager.java:computeReplicationWorkForBlocks(1529)) - Blocks chosen but could not be replicated = 8; of which 8 have no target, 0 have no source, 0 are UC, 0 are abandoned, 0 already have enough replicas. 2015-12-31 10:09:38,635 INFO hdfs.StateChange (FSNamesystem.java:saveAllocatedBlock(3574)) - BLOCK* allocate blk_1073964742_223940{UCState=UNDER_CONSTRUCTION, truncateBlock=null, primaryNodeIndex=-1, replicas=[ReplicaUC[[DISK]DS-0c616a45-8b95-4c41-b592-0821b07a8803:NORMAL:10.1.1.82:50010|RBW], ReplicaUC[[DISK]DS-0a078e05-8825-4ea4-952d-5dc617317989:NORMAL:10.1.1.28:50010|RBW], ReplicaUC[[DISK]DS-a81872bf-681a-41d9-b5bd-a4241536e2ed:NORMAL:10.1.1.26:50010|RBW], ReplicaUC[[DISK]DS-be0ad8a7-2413-493d-9706-b7bf46dad668:NORMAL:10.1.1.24:50010|RBW]]} for /apps/accumulo/data/tables/!0/table_info/F0001jq5.rf_tmp 2015-12-31 10:09:38,677 INFO hdfs.StateChange (FSNamesystem.java:completeFile(3494)) - DIR* completeFile: /apps/accumulo/data/tables/!0/table_info/F0001jq5.rf_tmp is closed by DFSClient_NONMAPREDUCE_-1241177763_29 2015-12-31 10:09:38,872 INFO hdfs.StateChange (FSNamesystem.java:saveAllocatedBlock(3574)) - BLOCK* allocate blk_1073964743_223941{UCState=UNDER_CONSTRUCTION, truncateBlock=null, primaryNodeIndex=-1, replicas=[ReplicaUC[[DISK]DS-e21e239f-1ad9-4aff-8a8c-419671f8f87a:NORMAL:10.1.1.82:50010|RBW], ReplicaUC[[DISK]DS-a47ab1c7-9f5a-48fb-8613-1557c412c20a:NORMAL:10.1.1.28:50010|RBW], ReplicaUC[[DISK]DS-be0ad8a7-2413-493d-9706-b7bf46dad668:NORMAL:10.1.1.24:50010|RBW], ReplicaUC[[DISK]DS-165a6e3c-9ded-496e-8c21-40f32f482e3e:NORMAL:10.1.1.26:50010|RBW]]} for /apps/accumulo/data/tables/+r/root_tablet/F0001jq6.rf_tmp 2015-12-31 10:09:38,916 INFO hdfs.StateChange (FSNamesystem.java:saveAllocatedBlock(3574)) - BLOCK* allocate blk_1073964744_223942{UCState=UNDER_CONSTRUCTION, truncateBlock=null, primaryNodeIndex=-1, replicas=[ReplicaUC[[DISK]DS-e21e239f-1ad9-4aff-8a8c-419671f8f87a:NORMAL:10.1.1.82:50010|RBW], ReplicaUC[[DISK]DS-165a6e3c-9ded-496e-8c21-40f32f482e3e:NORMAL:10.1.1.26:50010|RBW], ReplicaUC[[DISK]DS-9d1e974d-56e1-4f5f-9b2c-9437041cf148:NORMAL:10.1.1.24:50010|RBW], ReplicaUC[[DISK]DS-0a078e05-8825-4ea4-952d-5dc617317989:NORMAL:10.1.1.28:50010|RBW]]} for /apps/accumulo/data/tables/!0/table_info/A0001jq7.rf_tmp 2015-12-31 10:09:38,919 INFO hdfs.StateChange (FSNamesystem.java:completeFile(3494)) - DIR* completeFile: /apps/accumulo/data/tables/+r/root_tablet/F0001jq6.rf_tmp is closed by DFSClient_NONMAPREDUCE_-1241177763_29 2015-12-31 10:09:38,969 INFO hdfs.StateChange (FSNamesystem.java:completeFile(3494)) - DIR* completeFile: /apps/accumulo/data/tables/!0/table_info/A0001jq7.rf_tmp is closed by DFSClient_NONMAPREDUCE_-1241177763_29 2015-12-31 10:09:39,006 INFO BlockStateChange (UnderReplicatedBlocks.java:chooseUnderReplicatedBlocks(407)) - chooseUnderReplicatedBlocks selected 8 blocks at priority level 2; Total=8 2015-12-31 10:09:39,006 INFO BlockStateChange (BlockManager.java:computeReplicationWorkForBlocks(1522)) - BLOCK* neededReplications = 6851, pendingReplications = 0. 2015-12-31 10:09:39,006 INFO blockmanagement.BlockManager (BlockManager.java:computeReplicationWorkForBlocks(1529)) - Blocks chosen but could not be replicated = 8; of which 8 have no target, 0 have no source, 0 are UC, 0 are abandoned, 0 already have enough replicas. 2015-12-31 10:09:39,051 INFO hdfs.StateChange (FSNamesystem.java:saveAllocatedBlock(3574)) - BLOCK* allocate blk_1073964745_223943{UCState=UNDER_CONSTRUCTION, truncateBlock=null, primaryNodeIndex=-1, replicas=[ReplicaUC[[DISK]DS-e21e239f-1ad9-4aff-8a8c-419671f8f87a:NORMAL:10.1.1.82:50010|RBW], ReplicaUC[[DISK]DS-165a6e3c-9ded-496e-8c21-40f32f482e3e:NORMAL:10.1.1.26:50010|RBW], ReplicaUC[[DISK]DS-0a078e05-8825-4ea4-952d-5dc617317989:NORMAL:10.1.1.28:50010|RBW], ReplicaUC[[DISK]DS-9d1e974d-56e1-4f5f-9b2c-9437041cf148:NORMAL:10.1.1.24:50010|RBW]]} for /apps/accumulo/data/tables/+r/root_tablet/A0001jq8.rf_tmp 2015-12-31 10:09:39,102 INFO hdfs.StateChange (FSNamesystem.java:completeFile(3494)) - DIR* completeFile: /apps/accumulo/data/tables/+r/root_tablet/A0001jq8.rf_tmp is closed by DFSClient_NONMAPREDUCE_-1241177763_29 2015-12-31 10:09:42,007 INFO BlockStateChange (UnderReplicatedBlocks.java:chooseUnderReplicatedBlocks(407)) - chooseUnderReplicatedBlocks selected 8 blocks at priority level 2; Total=8 2015-12-31 10:09:42,007 INFO BlockStateChange (BlockManager.java:computeReplicationWorkForBlocks(1522)) - BLOCK* neededReplications = 6852, pendingReplications = 0. 2015-12-31 10:09:42,007 INFO blockmanagement.BlockManager (BlockManager.java:computeReplicationWorkForBlocks(1529)) - Blocks chosen but could not be replicated = 8; of which 8 have no target, 0 have no source, 0 are UC, 0 are abandoned, 0 already have enough replicas. Any help will be appreciate ? Thanks Stephane. ... View more