Re: NegativeArraySizeException during map segment merge

2019-09-04 Thread Prabhu Josephraj
1. Looking at IFile$Reader#nextRawValue, not sure why we create valBytes array of size 2 * currentValueLength even though it tries to read data of currentValueLength size. If there is no reason, this can be fixed which will fix the problem. public void nextRawValue(DataInputBuffer value) throws

NegativeArraySizeException during map segment merge

2019-09-04 Thread Stephen Durfey
I ran into an issue and am struggling to find a way around it. I have a job failing with the following output (version 2.7.0 of hadoop): 2019-09-04 13:20:30,026 DEBUG [main] org.apache.hadoop.mapred.MapRFsOutputBuffer: MapId=attempt_1567541971569_2612_m_003447_0 Reducer=133Spill

Re: Is shortcircuit-read (SCR) really fast?

2019-09-04 Thread Wei-Chiu Chuang
Hi Daegyu, let's move this discussion to the user group, so that any one else can comment on this. I obviously don't have the best answers to the questions. But these are great questions. Re: benchmarks for SCR: I believe yes. In fact, I found a benchmark running Accumulo and HBase on HDFS

Re: Why TEMPORARY block join setup pipeline process?

2019-09-04 Thread Kang Minwoo
I found same issue. https://issues.apache.org/jira/browse/HDFS-10714 However this issue seems like holding. Sent from my iPhone 2019. 9. 4. 18:06, Kang Minwoo mailto:minwoo.k...@outlook.com>> 작성: Hello, Users. When Hadoop Cluster had a heavy write workload, Sometime DFS Client receives a

Why TEMPORARY block join setup pipeline process?

2019-09-04 Thread Kang Minwoo
Hello, Users. When Hadoop Cluster had a heavy write workload, Sometime DFS Client receives a ClosedByInterruptException. - similar issues: https://community.cloudera.com/t5/Community-Articles/Write-or-Append-failures-in-very-small-Clusters-under-heavy/ta-p/245446 As a result, DFS client tried