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https://issues.apache.org/jira/browse/HBASE-19750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16338948#comment-16338948
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Jingcheng Du commented on HBASE-19750:
--------------------------------------
Thanks [~suxingfate] for the patch. +1 on the 005 patch.
Hi [~carp84], what's your idea on the latest patch? Thanks.
> print pretty rowkey in getExceptionMessageAdditionalDetail
> ----------------------------------------------------------
>
> Key: HBASE-19750
> URL: https://issues.apache.org/jira/browse/HBASE-19750
> Project: HBase
> Issue Type: Improvement
> Components: Client
> Reporter: Wang, Xinglong
> Assignee: Wang, Xinglong
> Priority: Minor
> Attachments: HBASE-19750.001.patch, HBASE-19750.002.patch,
> HBASE-19750.003.patch, HBASE-19750.004.patch, HBASE-19750.005.patch
>
>
> Sometimes the rowkey is binary format and is not able to print out human
> readable string. In this case, the exception will still try to call the
> toString() method and result in something like '�\(�\'.
> It will be very inefficient to trouble shooting the issue when we get such
> kind of exception. We can't identify the problematic row key based on the
> printout.
> The idea here is that print out the rowkey use Bytes.toStringBinary() in
> additional with Bytes.toString(row).
> If the row is serialized from human readable string, then Bytes.toString(row)
> makes more sense. When it's from human unreadable string, then
> Bytes.toStringBinary(row) will help.
> The output of Bytes.toStringBinary(row) anyway can be applied to hbase shell
> to do the scan so that we can easily identify the corresponding row.
> {code:java}
> 2017-12-16 07:25:41,304 INFO [main]
> org.apache.hadoop.hbase.mapreduce.TableRecordReaderImpl: recovered from
> org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed after
> attempts=36, exceptions:
> Sat Dec 16 07:25:41 GMT-07:00 2017, null, java.net.SocketTimeoutException:
> callTimeout=250000, callDuration=250473: row '�\(�\' on table 'mytable' at
> region=mytable,\xDF\x5C(\xF5\xC2\x8F\x5C\x1B,1412216342143.5d74ce411eecd40001d9bf6e62f0b607.,
> hostname=mycluster.internal.xx.com,60020,1503881012672, seqNum=6265890293
> at
> org.apache.hadoop.hbase.client.RpcRetryingCallerWithReadReplicas.throwEnrichedException(RpcRetryingCallerWithReadReplicas.java:271)
> at
> org.apache.hadoop.hbase.client.ScannerCallableWithReplicas.call(ScannerCallableWithReplicas.java:203)
> at
> org.apache.hadoop.hbase.client.ScannerCallableWithReplicas.call(ScannerCallableWithReplicas.java:60)
> at
> org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithoutRetries(RpcRetryingCaller.java:200)
> at
> org.apache.hadoop.hbase.client.ClientScanner.call(ClientScanner.java:320)
> at
> org.apache.hadoop.hbase.client.ClientScanner.loadCache(ClientScanner.java:403)
> at
> org.apache.hadoop.hbase.client.ClientScanner.next(ClientScanner.java:364)
> at
> org.apache.hadoop.hbase.mapreduce.TableRecordReaderImpl.nextKeyValue(TableRecordReaderImpl.java:205)
> at
> org.apache.hadoop.hbase.mapreduce.TableRecordReader.nextKeyValue(TableRecordReader.java:147)
> at
> org.apache.hadoop.hbase.mapreduce.TableInputFormatBase$1.nextKeyValue(TableInputFormatBase.java:216)
> at
> org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.nextKeyValue(MapTask.java:556)
> at
> org.apache.hadoop.mapreduce.task.MapContextImpl.nextKeyValue(MapContextImpl.java:80)
> at
> org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.nextKeyValue(WrappedMapper.java:91)
> at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:145)
> at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:787)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
> at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:168)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1709)
> at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:162)
> {code}
> Current code:
> RegionServerCallable.java
> {code:java}
> public String getExceptionMessageAdditionalDetail() {
> return "row '" + Bytes.toString(row) + "' on table '" + tableName + "' at
> " + location;
> }
> {code}
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