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https://issues.apache.org/jira/browse/HBASE-18975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16198892#comment-16198892
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Ted Yu commented on HBASE-18975:
--------------------------------
Looking at DistCp.java , the NullPointerException came from this line:
{code}
jobFS.delete(metaFolder, true);
{code}
I have outlined the procedure for testing against hadoop3 in HBASE-18843
> B&R hadoop3 incompatibility
> ---------------------------
>
> Key: HBASE-18975
> URL: https://issues.apache.org/jira/browse/HBASE-18975
> Project: HBase
> Issue Type: Bug
> Reporter: Vladimir Rodionov
> Assignee: Vladimir Rodionov
> Priority: Blocker
> Attachments: HBASE-18975-v1.patch, HBASE-18975-v2.patch,
> testIncrementalBackup-output.tar.gz
>
>
> Due to changes in hadoop 3, reflection in BackupDistCp is broken
> {code}
> java.lang.NoSuchFieldException: inputOptions
> at java.lang.Class.getDeclaredField(Class.java:2070)
> at
> org.apache.hadoop.hbase.backup.mapreduce.MapReduceBackupCopyJob$BackupDistCp.execute(MapReduceBackupCopyJob.java:168)
> {code}
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