Eisuke Umeda created HDFS-10775:
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Summary: Under-Replicated Blocks can not be recovered
Key: HDFS-10775
URL: https://issues.apache.org/jira/browse/HDFS-10775
Project: Hadoop HDFS
Issue Type: Bug
Components: erasure-coding
Affects Versions: 3.0.0-alpha1
Environment: 2 NameNodes, 5 DataNodes, Erasured code policy is set as
"RS-DEFAULT-3-2-64k"
Reporter: Eisuke Umeda
I killed DataNode in the middle of the writing of the EC file. Under-Replicated
Blocks has occurred, but did not recover.
DataNodes: datanode[1-5]
Rack awareness: not set
Copy target files: /tmp/tpcds-generate/25/store_sales/*
{code}
$ hdfs dfs -ls /tmp/tpcds-generate/25/store_sales
Found 25 items
-rw-r--r-- 0 root supergroup 399430918 2016-08-16 15:11
/tmp/tpcds-generate/25/store_sales/data-m-00000
-rw-r--r-- 0 root supergroup 399054598 2016-08-16 15:11
/tmp/tpcds-generate/25/store_sales/data-m-00001
-rw-r--r-- 0 root supergroup 399329373 2016-08-16 15:11
/tmp/tpcds-generate/25/store_sales/data-m-00002
-rw-r--r-- 0 root supergroup 399528459 2016-08-16 15:11
/tmp/tpcds-generate/25/store_sales/data-m-00003
-rw-r--r-- 0 root supergroup 399329624 2016-08-16 15:11
/tmp/tpcds-generate/25/store_sales/data-m-00004
-rw-r--r-- 0 root supergroup 399085924 2016-08-16 15:11
/tmp/tpcds-generate/25/store_sales/data-m-00005
-rw-r--r-- 0 root supergroup 399337384 2016-08-16 15:12
/tmp/tpcds-generate/25/store_sales/data-m-00006
-rw-r--r-- 0 root supergroup 399199458 2016-08-16 15:12
/tmp/tpcds-generate/25/store_sales/data-m-00007
-rw-r--r-- 0 root supergroup 399679096 2016-08-16 15:12
/tmp/tpcds-generate/25/store_sales/data-m-00008
-rw-r--r-- 0 root supergroup 399440431 2016-08-16 15:12
/tmp/tpcds-generate/25/store_sales/data-m-00009
-rw-r--r-- 0 root supergroup 399403931 2016-08-16 15:12
/tmp/tpcds-generate/25/store_sales/data-m-00010
-rw-r--r-- 0 root supergroup 399472465 2016-08-16 15:12
/tmp/tpcds-generate/25/store_sales/data-m-00011
-rw-r--r-- 0 root supergroup 399451784 2016-08-16 15:12
/tmp/tpcds-generate/25/store_sales/data-m-00012
-rw-r--r-- 0 root supergroup 399240168 2016-08-16 15:12
/tmp/tpcds-generate/25/store_sales/data-m-00013
-rw-r--r-- 0 root supergroup 399370507 2016-08-16 15:12
/tmp/tpcds-generate/25/store_sales/data-m-00014
-rw-r--r-- 0 root supergroup 399633351 2016-08-16 15:12
/tmp/tpcds-generate/25/store_sales/data-m-00015
-rw-r--r-- 0 root supergroup 396532952 2016-08-16 15:13
/tmp/tpcds-generate/25/store_sales/data-m-00016
-rw-r--r-- 0 root supergroup 396258715 2016-08-16 15:13
/tmp/tpcds-generate/25/store_sales/data-m-00017
-rw-r--r-- 0 root supergroup 396382486 2016-08-16 15:13
/tmp/tpcds-generate/25/store_sales/data-m-00018
-rw-r--r-- 0 root supergroup 399016456 2016-08-16 15:13
/tmp/tpcds-generate/25/store_sales/data-m-00019
-rw-r--r-- 0 root supergroup 399465745 2016-08-16 15:13
/tmp/tpcds-generate/25/store_sales/data-m-00020
-rw-r--r-- 0 root supergroup 399208235 2016-08-16 15:13
/tmp/tpcds-generate/25/store_sales/data-m-00021
-rw-r--r-- 0 root supergroup 399198296 2016-08-16 15:13
/tmp/tpcds-generate/25/store_sales/data-m-00022
-rw-r--r-- 0 root supergroup 399599711 2016-08-16 15:13
/tmp/tpcds-generate/25/store_sales/data-m-00023
-rw-r--r-- 0 root supergroup 395150855 2016-08-16 15:13
/tmp/tpcds-generate/25/store_sales/data-m-00024
{code}
Destination directory: /tmp/tpcds-generate/test
{code}
$ sudo -u hdfs hdfs erasurecode -getPolicy /tmp/tpcds-generate/test
ErasureCodingPolicy=[Name=RS-DEFAULT-3-2-64k,
Schema=[ECSchema=[Codec=rs-default, numDataUnits=3, numParityUnits=2]],
CellSize=65536 ]
{code}
The following is the steps to reproduce:
1) hdfs dfs -cp /tmp/tpcds-generate/25/store_sales/* /tmp/tpcds-generate/test
2) datanode1: (in the middle of the copy) sudo pkill -9 -f datanode
3) start a process of datanode1 two minutes later
4) wait for a while
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