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HDFS-11204. Document the missing options of hdfs zkfc command. Contributed by Yiqun Lin. 

(cherry picked from commit 72bff192cd)
(cherry picked from commit 190b2dca62)
This commit is contained in:
Akira Ajisaka 2016-12-14 18:50:43 +09:00
parent 158292fd7e
commit 901bc5eef5
2 changed files with 6 additions and 3 deletions
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5
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ha/ZKFailoverController.java
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@ -84,7 +84,10 @@ public abstract class ZKFailoverController {
};
protected static final String USAGE =
"Usage: hdfs zkfc [ -formatZK [-force] [-nonInteractive] ]";
"Usage: hdfs zkfc [ -formatZK [-force] [-nonInteractive] ]\n"
+ "\t-force: formats the znode if the znode exists.\n"
+ "\t-nonInteractive: formats the znode aborts if the znode exists,\n"
+ "\tunless -force option is specified.";
/** Unable to format the parent znode in ZK */
static final int ERR_CODE_FORMAT_DENIED = 2;

2
hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HDFSCommands.md
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@ -504,7 +504,7 @@ Usage: `hdfs zkfc [-formatZK [-force] [-nonInteractive]]`
| COMMAND\_OPTION | Description |
|:---- |:---- |
| `-formatZK` | Format the Zookeeper instance |
| `-formatZK` | Format the Zookeeper instance. -force: formats the znode if the znode exists. -nonInteractive: formats the znode aborts if the znode exists, unless -force option is specified. |
| `-h` | Display help |
This comamnd starts a Zookeeper Failover Controller process for use with [HDFS HA with QJM](./HDFSHighAvailabilityWithQJM.html#Administrative_commands).