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https://issues.apache.org/jira/browse/HBASE-26464?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17448593#comment-17448593
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Nihal Jain commented on HBASE-26464:
------------------------------------
Ping [~busbey] [~wchevreuil]
> WALPrettyPrinter: JSON output is broken/malformed
> -------------------------------------------------
>
> Key: HBASE-26464
> URL: https://issues.apache.org/jira/browse/HBASE-26464
> Project: HBase
> Issue Type: Bug
> Components: tooling
> Affects Versions: 3.0.0-alpha-1, 1.7.1, 2.4.8
> Reporter: Nihal Jain
> Assignee: Nihal Jain
> Priority: Major
>
> The JSON output of wal pretty printer is malformed and cannot be parsed.
> There are 2 major issue:
> * The writer classes and cell codec classes are added (as normal text)
> whenever a new WAL file printing starts (NOTE: WALPrettyPrinter can take
> multiple WAL files as input)
> * The edit heap size and position are outside json formatting
> These are side effects of some patches done in past which missed to cover
> json output scenarios.
> Current sample output, which is malformed JSON:
> {code:java}
> [Writer Classes: ProtobufLogWriter AsyncProtobufLogWriter
> Cell Codec Class: org.apache.hadoop.hbase.regionserver.wal.WALCellCodec
> {"sequence":"3","region":"f0153c5d890d96f06ec304eebc4aacf9","actions":[{"qualifier":"HBASE::REGION_EVENT::REGION_OPEN","vlen":176,"row":"\\x00","type":"Put","family":"METAFAMILY","timestamp":"1637170532553","total_size_sum":"288"}],"table":{"name":[104,98,97,115,101,58,110,97,109,101,115,112,97,99,101],"nameAsString":"hbase:namespace","namespace":[104,98,97,115,101],"namespaceAsString":"hbase","qualifier":[110,97,109,101,115,112,97,99,101],"qualifierAsString":"namespace","systemTable":true,"hashCode":771659354}}edit
> heap size: 328
> position: 389
> ,{"sequence":"26","region":"e42fbcf354fcf7e4e425f2d06130797c","actions":[{"qualifier":"HBASE::REGION_EVENT::REGION_OPEN","vlen":218,"row":"\\x00","type":"Put","family":"METAFAMILY","timestamp":"1637170533215","total_size_sum":"336"}],"table":{"name":[116,101,115,116],"nameAsString":"test","namespace":[100,101,102,97,117,108,116],"namespaceAsString":"default","qualifier":[116,101,115,116],"qualifierAsString":"test","systemTable":false,"hashCode":3556498}}edit
> heap size: 376
> position: 726
> ,{"sequence":"4","region":"f0153c5d890d96f06ec304eebc4aacf9","actions":[{"qualifier":"d","vlen":9,"row":"default","type":"Put","family":"info","timestamp":"1637170533278","total_size_sum":"96"}],"table":{"name":[104,98,97,115,101,58,110,97,109,101,115,112,97,99,101],"nameAsString":"hbase:namespace","namespace":[104,98,97,115,101],"namespaceAsString":"hbase","qualifier":[110,97,109,101,115,112,97,99,101],"qualifierAsString":"namespace","systemTable":true,"hashCode":771659354}}edit
> heap size: 136
> position: 834
> ,{"sequence":"5","region":"f0153c5d890d96f06ec304eebc4aacf9","actions":[{"qualifier":"d","vlen":7,"row":"hbase","type":"Put","family":"info","timestamp":"1637170533340","total_size_sum":"88"}],"table":{"name":[104,98,97,115,101,58,110,97,109,101,115,112,97,99,101],"nameAsString":"hbase:namespace","namespace":[104,98,97,115,101],"namespaceAsString":"hbase","qualifier":[110,97,109,101,115,112,97,99,101],"qualifierAsString":"namespace","systemTable":true,"hashCode":771659354}}edit
> heap size: 128
> position: 938
> ,{"sequence":"27","region":"e42fbcf354fcf7e4e425f2d06130797c","actions":[{"qualifier":"","vlen":2,"row":"r6","type":"Put","family":"cf","timestamp":"1637170714545","total_size_sum":"80"}],"table":{"name":[116,101,115,116],"nameAsString":"test","namespace":[100,101,102,97,117,108,116],"namespaceAsString":"default","qualifier":[116,101,115,116],"qualifierAsString":"test","systemTable":false,"hashCode":3556498}}edit
> heap size: 120
> position: 1020
> Writer Classes: ProtobufLogWriter AsyncProtobufLogWriter
> Cell Codec Class: org.apache.hadoop.hbase.regionserver.wal.WALCellCodec
> ,{"sequence":"3","region":"f0153c5d890d96f06ec304eebc4aacf9","actions":[{"qualifier":"HBASE::REGION_EVENT::REGION_OPEN","vlen":176,"row":"\\x00","type":"Put","family":"METAFAMILY","timestamp":"1637170532553","total_size_sum":"288"}],"table":{"name":[104,98,97,115,101,58,110,97,109,101,115,112,97,99,101],"nameAsString":"hbase:namespace","namespace":[104,98,97,115,101],"namespaceAsString":"hbase","qualifier":[110,97,109,101,115,112,97,99,101],"qualifierAsString":"namespace","systemTable":true,"hashCode":771659354}}edit
> heap size: 328
> position: 389
> ,{"sequence":"26","region":"e42fbcf354fcf7e4e425f2d06130797c","actions":[{"qualifier":"HBASE::REGION_EVENT::REGION_OPEN","vlen":218,"row":"\\x00","type":"Put","family":"METAFAMILY","timestamp":"1637170533215","total_size_sum":"336"}],"table":{"name":[116,101,115,116],"nameAsString":"test","namespace":[100,101,102,97,117,108,116],"namespaceAsString":"default","qualifier":[116,101,115,116],"qualifierAsString":"test","systemTable":false,"hashCode":3556498}}edit
> heap size: 376
> position: 726
> ,{"sequence":"4","region":"f0153c5d890d96f06ec304eebc4aacf9","actions":[{"qualifier":"d","vlen":9,"row":"default","type":"Put","family":"info","timestamp":"1637170533278","total_size_sum":"96"}],"table":{"name":[104,98,97,115,101,58,110,97,109,101,115,112,97,99,101],"nameAsString":"hbase:namespace","namespace":[104,98,97,115,101],"namespaceAsString":"hbase","qualifier":[110,97,109,101,115,112,97,99,101],"qualifierAsString":"namespace","systemTable":true,"hashCode":771659354}}edit
> heap size: 136
> position: 834
> ,{"sequence":"5","region":"f0153c5d890d96f06ec304eebc4aacf9","actions":[{"qualifier":"d","vlen":7,"row":"hbase","type":"Put","family":"info","timestamp":"1637170533340","total_size_sum":"88"}],"table":{"name":[104,98,97,115,101,58,110,97,109,101,115,112,97,99,101],"nameAsString":"hbase:namespace","namespace":[104,98,97,115,101],"namespaceAsString":"hbase","qualifier":[110,97,109,101,115,112,97,99,101],"qualifierAsString":"namespace","systemTable":true,"hashCode":771659354}}edit
> heap size: 128
> position: 938
> ,{"sequence":"27","region":"e42fbcf354fcf7e4e425f2d06130797c","actions":[{"qualifier":"","vlen":2,"row":"r6","type":"Put","family":"cf","timestamp":"1637170714545","total_size_sum":"80"}],"table":{"name":[116,101,115,116],"nameAsString":"test","namespace":[100,101,102,97,117,108,116],"namespaceAsString":"default","qualifier":[116,101,115,116],"qualifierAsString":"test","systemTable":false,"hashCode":3556498}}edit
> heap size: 120
> position: 1020
> ]
> {code}
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