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https://issues.apache.org/jira/browse/HBASE-16972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15669687#comment-15669687
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Nick Dimiduk commented on HBASE-16972:
--------------------------------------
Change appears only to add new fields to a json-ish blob, so I'm (belatedly)
okay with this for release lines. It would break folks who are parsing
positionally, but it's structured, so they don't have so much room to complain.
Strong objections [~busbey]? I guess it's already out in 1.2.4, so that's that.
> Log more details for Scan#next request when responseTooSlow
> -----------------------------------------------------------
>
> Key: HBASE-16972
> URL: https://issues.apache.org/jira/browse/HBASE-16972
> Project: HBase
> Issue Type: Improvement
> Components: Operability
> Affects Versions: 1.2.3, 1.1.7
> Reporter: Yu Li
> Assignee: Yu Li
> Fix For: 2.0.0, 1.3.0, 1.4.0, 1.2.4, 1.1.8
>
> Attachments: HBASE-16972.patch, HBASE-16972.v2.patch,
> HBASE-16972.v3.patch
>
>
> Currently for if responseTooSlow happens on the scan.next call, we will get
> warn log like below:
> {noformat}
> 2016-10-31 11:43:23,430 WARN
> [RpcServer.FifoWFPBQ.priority.handler=5,queue=1,port=60193]
> ipc.RpcServer(2574):
> (responseTooSlow):
> {"call":"Scan(org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos$ScanRequest)",
> "starttimems":1477885403428,"responsesize":52,"method":"Scan","param":"scanner_id:
> 11 number_of_rows: 2147483647
> close_scanner: false next_call_seq: 0 client_handles_partials: true
> client_handles_heartbeats: true
> track_scan_metrics: false renew:
> false","processingtimems":2,"client":"127.0.0.1:60254","queuetimems":0,"class":"HMaster"}
> {noformat}
> From which we only have a {{scanner_id}} and impossible to know what exactly
> this scan is about, like against which region of which table.
> After this JIRA, we will improve the message to something like below (notice
> the last line):
> {noformat}
> 2016-10-31 11:43:23,430 WARN
> [RpcServer.FifoWFPBQ.priority.handler=5,queue=1,port=60193]
> ipc.RpcServer(2574):
> (responseTooSlow):
> {"call":"Scan(org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos$ScanRequest)",
> "starttimems":1477885403428,"responsesize":52,"method":"Scan","param":"scanner_id:
> 11 number_of_rows: 2147483647
> close_scanner: false next_call_seq: 0 client_handles_partials: true
> client_handles_heartbeats: true
> track_scan_metrics: false renew:
> false","processingtimems":2,"client":"127.0.0.1:60254","queuetimems":0,"class":"HMaster",
> "scandetails":"table: hbase:meta region: hbase:meta,,1.1588230740"}
> {noformat}
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