[HDFS-8341] HDFS mover stuck in loop trying to move corrupt block with no other valid replicas, doesn't move rest of other data blocks

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Cannot Reproduce
• Affects Version/s: 2.6.0
• Component/s: balancer & mover

Environment

HDP 2.2

• Assignee: Unassigned
• Reporter: Hari Sekhon
• Created: 07/May/15 14:13
• Updated: 23/Sep/15 13:22
• Resolved: 23/Sep/15 13:22

Description

HDFS mover gets stuck looping on a block that fails to move and doesn't migrate the rest of the blocks.

This is preventing recovery of data from a decomissioning external storage tier used for archive (we've had problems with that proprietary "hyperscale" storage product which is why a couple blocks here and there have checksum problems or premature eof as shown below), but this should not prevent moving all the other blocks to recover our data:

hdfs mover -p /apps/hive/warehouse/<custom_scrubbed>
15/05/07 14:52:50 INFO mover.Mover: namenodes = {hdfs://nameservice1=[/apps/hive/warehouse/<custom_scrubbed>]}
15/05/07 14:52:51 INFO balancer.KeyManager: Block token params received from NN: update interval=10hrs, 0sec, token lifetime=10hrs, 0sec
15/05/07 14:52:51 INFO block.BlockTokenSecretManager: Setting block keys
15/05/07 14:52:51 INFO balancer.KeyManager: Update block keys every 2hrs, 30mins, 0sec
15/05/07 14:52:52 INFO block.BlockTokenSecretManager: Setting block keys
15/05/07 14:52:52 INFO net.NetworkTopology: Adding a new node: /default-rack/<ip>:1019
15/05/07 14:52:52 INFO net.NetworkTopology: Adding a new node: /default-rack/<ip>:1019
15/05/07 14:52:52 INFO net.NetworkTopology: Adding a new node: /default-rack/<ip>:1019
15/05/07 14:52:52 INFO net.NetworkTopology: Adding a new node: /default-rack/<ip>:1019
15/05/07 14:52:52 INFO net.NetworkTopology: Adding a new node: /default-rack/<ip>:1019
15/05/07 14:52:52 INFO net.NetworkTopology: Adding a new node: /default-rack/<ip>:1019
15/05/07 14:52:52 WARN balancer.Dispatcher: Failed to move blk_1075156654_1438349 with size=134217728 from <ip>:1019:ARCHIVE to <ip>:1019:DISK through <ip>:1019: block move is failed: opReplaceBlock BP-120244285-<ip>-1417023863606:blk_1075156654_1438349 received exception java.io.EOFException: Premature EOF: no length prefix available
<NOW IT STARTS LOOPING ON SAME BLOCK>
15/05/07 14:53:31 INFO net.NetworkTopology: Adding a new node: /default-rack/<ip>:1019
15/05/07 14:53:31 INFO net.NetworkTopology: Adding a new node: /default-rack/<ip>:1019
15/05/07 14:53:31 INFO net.NetworkTopology: Adding a new node: /default-rack/<ip>:1019
15/05/07 14:53:31 INFO net.NetworkTopology: Adding a new node: /default-rack/<ip>:1019
15/05/07 14:53:31 INFO net.NetworkTopology: Adding a new node: /default-rack/<ip>:1019
15/05/07 14:53:31 INFO net.NetworkTopology: Adding a new node: /default-rack/<ip>:1019
15/05/07 14:53:31 WARN balancer.Dispatcher: Failed to move blk_1075156654_1438349 with size=134217728 from <ip>:1019:ARCHIVE to <ip>:1019:DISK through <ip>:1019: block move is failed: opReplaceBlock BP-120244285-<ip>-1417023863606:blk_1075156654_1438349 received exception java.io.EOFException: Premature EOF: no length prefix available
...<repeat indefinitely>...