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YARN-7094. Document the current known issue with server-side NM graceful decom (rkanter)

This commit is contained in:
Robert Kanter 2017-08-30 18:04:55 -07:00
parent cc23514aba
commit ce79f7be29
2 changed files with 4 additions and 3 deletions
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3
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/cli/RMAdminCLI.java
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@ -113,7 +113,8 @@ public class RMAdminCLI extends HAAdmin {
+ " be handled by the client or the ResourceManager. The client"
+ "-side tracking is blocking, while the server-side tracking"
+ " is not. Omitting the timeout, or a timeout of -1, indicates"
+ " an infinite timeout."))
+ " an infinite timeout. Known Issue: the server-side tracking"
+ " will immediately decommission if an RM HA failover occurs."))
.put("-refreshNodesResources", new UsageInfo("",
"Refresh resources of NodeManagers at the ResourceManager."))
.put("-refreshSuperUserGroupsConfiguration", new UsageInfo("",

4
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/YarnCommands.md
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@ -189,7 +189,7 @@ Usage:
```
Usage: yarn rmadmin
-refreshQueues
-refreshNodes [-g [timeout in seconds]]
-refreshNodes [-g|graceful [timeout in seconds] -client|server]
-refreshNodesResources
-refreshSuperUserGroupsConfiguration
-refreshUserToGroupsMappings
@ -214,7 +214,7 @@ Usage:
| COMMAND\_OPTIONS | Description |
|:---- |:---- |
| -refreshQueues | Reload the queues' acls, states and scheduler specific properties. ResourceManager will reload the mapred-queues configuration file. |
| -refreshNodes [-g|graceful [timeout in seconds] -client|server] | Refresh the hosts information at the ResourceManager. -g option indicates graceful decommission of excluded hosts, in which case, the optional timeout indicates maximal time in seconds ResourceManager should wait before forcefully mark the node as decommissioned. |
| -refreshNodes [-g|graceful [timeout in seconds] -client|server] | Refresh the hosts information at the ResourceManager. Here [-g|graceful [timeout in seconds] -client|server] is optional, if we specify the timeout then ResourceManager will wait for timeout before marking the NodeManager as decommissioned. The -client|server indicates if the timeout tracking should be handled by the client or the ResourceManager. The client-side tracking is blocking, while the server-side tracking is not. Omitting the timeout, or a timeout of -1, indicates an infinite timeout. Known Issue: the server-side tracking will immediately decommission if an RM HA failover occurs. |
| -refreshNodesResources | Refresh resources of NodeManagers at the ResourceManager. |
| -refreshSuperUserGroupsConfiguration | Refresh superuser proxy groups mappings. |
| -refreshUserToGroupsMappings | Refresh user-to-groups mappings. |