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HDFS-10280. Document new dfsadmin command -evictWriters. Contributed by Wei-Chiu Chuang. 

(cherry picked from commit c970f1d005)

Conflicts:
	hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HDFSCommands.md
This commit is contained in:
Kihwal Lee 2016-04-14 12:50:36 -05:00
parent 4d90014560
commit 019ca8f7c1
2 changed files with 6 additions and 0 deletions
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4
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java
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@ -425,6 +425,7 @@ public class DFSAdmin extends FsShell {
"\t[-allowSnapshot <snapshotDir>]\n" + "\t[-allowSnapshot <snapshotDir>]\n" +
"\t[-disallowSnapshot <snapshotDir>]\n" + "\t[-disallowSnapshot <snapshotDir>]\n" +
"\t[-shutdownDatanode <datanode_host:ipc_port> [upgrade]]\n" + "\t[-shutdownDatanode <datanode_host:ipc_port> [upgrade]]\n" +
"\t[-evictWriters <datanode_host:ipc_port>]\n" +
"\t[-getDatanodeInfo <datanode_host:ipc_port>]\n" + "\t[-getDatanodeInfo <datanode_host:ipc_port>]\n" +
"\t[-metasave filename]\n" + "\t[-metasave filename]\n" +
"\t[-triggerBlockReport [-incremental] <datanode_host:ipc_port>]\n" + "\t[-triggerBlockReport [-incremental] <datanode_host:ipc_port>]\n" +
@ -1717,6 +1718,9 @@ public class DFSAdmin extends FsShell {
} else if ("-shutdownDatanode".equals(cmd)) { } else if ("-shutdownDatanode".equals(cmd)) {
System.err.println("Usage: hdfs dfsadmin" System.err.println("Usage: hdfs dfsadmin"
+ " [-shutdownDatanode <datanode_host:ipc_port> [upgrade]]"); + " [-shutdownDatanode <datanode_host:ipc_port> [upgrade]]");
} else if ("-evictWriters".equals(cmd)) {
System.err.println("Usage: hdfs dfsadmin"
+ " [-evictWriters <datanode_host:ipc_port>]");
} else if ("-getDatanodeInfo".equals(cmd)) { } else if ("-getDatanodeInfo".equals(cmd)) {
System.err.println("Usage: hdfs dfsadmin" System.err.println("Usage: hdfs dfsadmin"
+ " [-getDatanodeInfo <datanode_host:ipc_port>]"); + " [-getDatanodeInfo <datanode_host:ipc_port>]");

2
hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HDFSCommands.md
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@ -347,6 +347,7 @@ Usage:
[-fetchImage <local directory>] [-fetchImage <local directory>]
[-shutdownDatanode <datanode_host:ipc_port> [upgrade]] [-shutdownDatanode <datanode_host:ipc_port> [upgrade]]
[-getDatanodeInfo <datanode_host:ipc_port>] [-getDatanodeInfo <datanode_host:ipc_port>]
[-evictWriters <datanode_host:ipc_port>]
[-triggerBlockReport [-incremental] <datanode_host:ipc_port>] [-triggerBlockReport [-incremental] <datanode_host:ipc_port>]
[-help [cmd]] [-help [cmd]]
@ -380,6 +381,7 @@ Usage:
| `-disallowSnapshot` \<snapshotDir\> | Disallowing snapshots of a directory to be created. All snapshots of the directory must be deleted before disallowing snapshots. See the [HDFS Snapshot Documentation](./HdfsSnapshots.html) for more information. | | `-disallowSnapshot` \<snapshotDir\> | Disallowing snapshots of a directory to be created. All snapshots of the directory must be deleted before disallowing snapshots. See the [HDFS Snapshot Documentation](./HdfsSnapshots.html) for more information. |
| `-fetchImage` \<local directory\> | Downloads the most recent fsimage from the NameNode and saves it in the specified local directory. | | `-fetchImage` \<local directory\> | Downloads the most recent fsimage from the NameNode and saves it in the specified local directory. |
| `-shutdownDatanode` \<datanode\_host:ipc\_port\> [upgrade] | Submit a shutdown request for the given datanode. See [Rolling Upgrade document](./HdfsRollingUpgrade.html#dfsadmin_-shutdownDatanode) for the detail. | | `-shutdownDatanode` \<datanode\_host:ipc\_port\> [upgrade] | Submit a shutdown request for the given datanode. See [Rolling Upgrade document](./HdfsRollingUpgrade.html#dfsadmin_-shutdownDatanode) for the detail. |
| `-evictWriters` \<datanode\_host:ipc\_port\> | Make the datanode evict all clients that are writing a block. This is useful if decommissioning is hung due to slow writers. |
| `-getDatanodeInfo` \<datanode\_host:ipc\_port\> | Get the information about the given datanode. See [Rolling Upgrade document](./HdfsRollingUpgrade.html#dfsadmin_-getDatanodeInfo) for the detail. | | `-getDatanodeInfo` \<datanode\_host:ipc\_port\> | Get the information about the given datanode. See [Rolling Upgrade document](./HdfsRollingUpgrade.html#dfsadmin_-getDatanodeInfo) for the detail. |
| `-triggerBlockReport` `[-incremental]` \<datanode\_host:ipc\_port\> | Trigger a block report for the given datanode. If 'incremental' is specified, it will be otherwise, it will be a full block report. | | `-triggerBlockReport` `[-incremental]` \<datanode\_host:ipc\_port\> | Trigger a block report for the given datanode. If 'incremental' is specified, it will be otherwise, it will be a full block report. |
| `-help` [cmd] | Displays help for the given command or all commands if none is specified. | | `-help` [cmd] | Displays help for the given command or all commands if none is specified. |