dragon created HDFS-10081:
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Summary: CLONE - Erasure coding: fix some minor bugs in EC CLI
Key: HDFS-10081
URL: https://issues.apache.org/jira/browse/HDFS-10081
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: dragon
Assignee: Walter Su
Priority: Minor
Fix For: HDFS-7285
issue 1: it's not user-friendly. We should tell user that `hdfs erasurecode`
is the entrance to EC commands(HDFS-7349)
{noformat}
# bin/hdfs
Usage: hdfs [--config confdir] [--daemon (start|stop|status)]
[--loglevel loglevel] COMMAND
where COMMAND is one of:
balancer run a cluster balancing utility
cacheadmin configure the HDFS cache
crypto configure HDFS encryption zones
...
zkfc run the ZK Failover Controller daemon
{noformat}
issue 2: it's not user-friendly
{noformat}
# bin/hdfs erasurecode -getZoneInfo /
-getZoneInfo: Fatal internal error
java.lang.NullPointerException
at
org.apache.hadoop.hdfs.tools.erasurecode.ECCommand$GetECZoneInfoCommand.processPath(ECCommand.java:168)
at org.apache.hadoop.fs.shell.Command.processPaths(Command.java:321)
at
org.apache.hadoop.fs.shell.Command.processPathArgument(Command.java:293)
at org.apache.hadoop.fs.shell.Command.processArgument(Command.java:275)
at org.apache.hadoop.fs.shell.Command.processArguments(Command.java:259)
at
org.apache.hadoop.fs.shell.Command.processRawArguments(Command.java:205)
at org.apache.hadoop.fs.shell.Command.run(Command.java:166)
at org.apache.hadoop.fs.FsShell.run(FsShell.java:291)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at org.apache.hadoop.hdfs.tools.erasurecode.ECCli.main(ECCli.java:45)
{noformat}
possible issue 3: We create zone twice at /
{noformat}
# bin/hdfs erasurecode -createZone /
EC Zone created successfully at hdfs://ds-34:9000/
# bin/hdfs erasurecode -createZone /
createZone: Unable to create EC zone for the path hdfs://ds-34:9000/
{noformat}
It doesn't print detail error message.
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