hfutatzhanghb

Can jmxtrans realize configuration flattern？

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for example，I want to collect the json format metrics as follow: "NodeUsage" : "{\"nodeUsage\":{\"min\":\"18.51%\",\"median\":\"84.89%\",\"max\":\"86.18%\",\"stdDev\":\"9.81%\"}}", is there any solution that can let us write ”NodeUsage.nodeUsage.min“ in jmxtrans's JSON configuration file。

Does NNA support hadoop with versions 3.3.2?

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Does NNA support hadoop with versions 3.3.2? Can any one tell me? Thanks a lot.

HDFS-17372. CommandProcessingThread#queue should use LinkedBlockingDeque to prevent high priority command blocked by low priority command

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### Description of PR Refer to HDFS-17372. Recently, we met a critical problem in our production cluster which have lots of small files. In that cluster, per datanode has almost...

HDFS-17365. EC: Add extra redunency configuration in checkStreamerFailures to prevent data loss.

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### Description of PR Refer to HDFS-17365. Currently, when we write ec files. It can tolerate with at most `numAllBlocks - numDataBlocks` failed streamers. However, this can lead to block...

HDFS-17374. EC: StripedBlockReader#newConnectedPeer should set SO_TIMEOUT and SO_KEEPALIVE

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### Description of PR Refer to HDFS-17374. We met a strange and serious problem on the one of product cluster using EC. The problem can be reproduced every time when...

TEST

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### Description of PR triiger yetus ### How was this patch tested? ### For code changes: - [ ] Does the title or this PR starts with the corresponding JIRA...

HDFS-17344. Last packet will be splited into two parts when write block.

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### Description of PR Refer to HDFS-17344. As mentioned in https://github.com/apache/hadoop/pull/6368#issuecomment-1899635293 This PR is trying to solve that problem.

HDFS-17280. Pipeline recovery should better end block in advance when bytes acked greater than half of blocksize.

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### Description of PR Refer to HDFS-17280 Pipeline recovery should better end block in advance when bytes acked greater than half of blocksize. I think this should be configurable by...

Fix unit tests testSlowConnection and testBadSetup failed in TestRPC

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### Description of PR Fix unit tests testSlowConnection and testBadSetup failed in TestRPC. When we invoke testSlowConnection or testBadSetup individually. we will get below exception result: ```plain java.lang.ClassCastException: org.apache.hadoop.ipc.protobuf.TestProtos$EmptyRequestProto cannot...

HDFS-17496. DataNode supports more fine-grained dataset lock based on blockid.

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### Description of PR Refer to HDFS-17496. Recently, we used NvmeSSD as volumes in datanodes and performed some stress tests. We found that NvmeSSD and HDD disks achieve similar performance...