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https://issues.apache.org/jira/browse/HBASE-16972?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Yu Li updated HBASE-16972:
--------------------------
      Resolution: Fixed
    Hadoop Flags: Reviewed
          Status: Resolved  (was: Patch Available)

Done pushing into all 1.1+ branches except for 1.3 (HBASE-17011 will do the 
backport for 1.3.1). Thanks all for review.

> 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, 1.4.0, 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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