steveloughran commented on issue #951: HADOOP-15183. S3Guard store becomes inconsistent after partial failure of rename URL: https://github.com/apache/hadoop/pull/951#issuecomment-503650640 need to create the TTL time provider in the DB for a non-FS init, else you get an NPE in the CLI prune ``` ~/P/h/h/t/hadoop-3.3.0-SNAPSHOT (s3/HADOOP-15183-s3guard-rename-failures ⚡↩☡+) bin/hadoop s3guard prune s3a://hwdev-steve-ireland-new/2019-06-19 18:12:59,376 [main] INFO s3guard.S3GuardTool (S3GuardTool.java:initMetadataStore(320)) - Metadata store DynamoDBMetadataStore{region=eu-west-1, tableName=hwdev-steve-ireland-new, tableArn=arn:aws:dynamodb:eu-west-1:980678866538:table/hwdev-steve-ireland-new} is initialized. java.lang.NullPointerException at org.apache.hadoop.fs.s3a.s3guard.DynamoDBMetadataStore.completeAncestry(DynamoDBMetadataStore.java:858) at org.apache.hadoop.fs.s3a.s3guard.DynamoDBMetadataStore.innerPut(DynamoDBMetadataStore.java:1226) at org.apache.hadoop.fs.s3a.s3guard.DynamoDBMetadataStore.removeAuthoritativeDirFlag(DynamoDBMetadataStore.java:1569) at org.apache.hadoop.fs.s3a.s3guard.DynamoDBMetadataStore.innerPrune(DynamoDBMetadataStore.java:1497) at org.apache.hadoop.fs.s3a.s3guard.DynamoDBMetadataStore.prune(DynamoDBMetadataStore.java:1461) at org.apache.hadoop.fs.s3a.s3guard.S3GuardTool$Prune.run(S3GuardTool.java:1094) at org.apache.hadoop.fs.s3a.s3guard.S3GuardTool.run(S3GuardTool.java:400) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76) at org.apache.hadoop.fs.s3a.s3guard.S3GuardTool.run(S3GuardTool.java:1659) at org.apache.hadoop.fs.s3a.s3guard.S3GuardTool.main(S3GuardTool.java:1668) 2019-06-19 18:12:59,945 [main] INFO util.ExitUtil (ExitUtil.java:terminate(210)) - Exiting with status -1: java.lang.NullPointerException ```
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