ywheel created OOZIE-2576:
-----------------------------
Summary: Oozie ssh action Cannot run program "scp"
Key: OOZIE-2576
URL: https://issues.apache.org/jira/browse/OOZIE-2576
Project: Oozie
Issue Type: Bug
Components: action
Affects Versions: 4.0.0
Environment: Oozie server build version: 4.0.0-cdh5.2.0
Reporter: ywheel
Priority: Minor
We used oozie ssh action in a production environment, the following xml codes
is the example:
<workflow-app name="TestSsh" xmlns="uri:oozie:workflow:0.4">
<start to="ShellAction"/>
<action name="ShellAction">
<ssh xmlns="uri:oozie:ssh-action:0.1">
<host>root@192.168.1.154</host>
<command>sh /tmp/test.sh</command>
<capture-output/>
</ssh>
<ok to="end"/>
<error to="kill"/>
</action>
<kill name="kill">
<message>Action failed, error
message[${wf:errorMessage(wf:lastErrorNode())}]</message>
</kill>
<end name="end"/>
</workflow-app>
However, we meet the errors below:
```
2016-06-12 22:30:54,713 INFO org.apache.oozie.action.ssh.SshActionExecutor:
SERVER[Master] USER[hdfs] GROUP[-] TOKEN[] APP[TestSsh]
JOB[0000201-160113124428061-oozie-oozi-W]
ACTION[0000201-160113124428061-oozie-oozi-W@ShellAction] Attempting to copy ssh
base scripts to remote host [root@192.168.1.154]
2016-06-12 22:30:54,869 WARN org.apache.oozie.action.ssh.SshActionExecutor:
SERVER[Master] USER[hdfs] GROUP[-] TOKEN[] APP[TestSsh]
JOB[0000201-160113124428061-oozie-oozi-W]
ACTION[0000201-160113124428061-oozie-oozi-W@ShellAction] Error while executing
ssh EXECUTION
2016-06-12 22:30:54,870 WARN org.apache.oozie.command.wf.ActionStartXCommand:
SERVER[Master] USER[hdfs] GROUP[-] TOKEN[] APP[TestSsh]
JOB[0000201-160113124428061-oozie-oozi-W]
ACTION[0000201-160113124428061-oozie-oozi-W@ShellAction] Error starting action
[ShellAction]. ErrorType [ERROR], ErrorCode [UNKOWN_ERROR], Message
[UNKOWN_ERROR: Cannot run program "scp": error=2, No such file or directory]
org.apache.oozie.action.ActionExecutorException: UNKOWN_ERROR: Cannot run
program "scp": error=2, No such file or directory
at
org.apache.oozie.action.ssh.SshActionExecutor.execute(SshActionExecutor.java:599)
at
org.apache.oozie.action.ssh.SshActionExecutor.start(SshActionExecutor.java:204)
at
org.apache.oozie.command.wf.ActionStartXCommand.execute(ActionStartXCommand.java:228)
at
org.apache.oozie.command.wf.ActionStartXCommand.execute(ActionStartXCommand.java:63)
at org.apache.oozie.command.XCommand.call(XCommand.java:281)
at
org.apache.oozie.service.CallableQueueService$CompositeCallable.call(CallableQueueService.java:323)
at
org.apache.oozie.service.CallableQueueService$CompositeCallable.call(CallableQueueService.java:252)
at
org.apache.oozie.service.CallableQueueService$CallableWrapper.run(CallableQueueService.java:174)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
Caused by: java.io.IOException: Cannot run program "scp": error=2, No such file
or directory
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1041)
at java.lang.Runtime.exec(Runtime.java:617)
at java.lang.Runtime.exec(Runtime.java:485)
at
org.apache.oozie.action.ssh.SshActionExecutor.executeCommand(SshActionExecutor.java:332)
at
org.apache.oozie.action.ssh.SshActionExecutor.setupRemote(SshActionExecutor.java:376)
at
org.apache.oozie.action.ssh.SshActionExecutor$1.call(SshActionExecutor.java:206)
at
org.apache.oozie.action.ssh.SshActionExecutor$1.call(SshActionExecutor.java:204)
at
org.apache.oozie.action.ssh.SshActionExecutor.execute(SshActionExecutor.java:548)
... 10 more
Caused by: java.io.IOException: error=2, No such file or directory
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:135)
at java.lang.ProcessImpl.start(ProcessImpl.java:130)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1022)
... 17 more
```
I checked the codes in org.apache.oozie.action.ssh.SshActionExecutor class, and
I found oozie would execute 'scp' command to copy two
files(ssh-base.sh,ssh-wrapper.sh) to the workspace folder on remote host. But
the logs could not show any information about which file is not found.
The workspace folder on remote host was created so the 'ssh'+ 'mkdir' command
was executed successfully before 'scp', which means the authentication from
oozie server to remote host is correct.
And I tried the following command to scp that two shell files manually:
```
scp -o PasswordAuthentication=no -o KbdInteractiveDevices=no -o
StrictHostKeyChecking=no -o ConnectTimeout=20
/var/run/cloudera-scm-agent/process/3518-oozie-OOZIE_SERVER/temp/oozie-oozi2411540976346867728.dir/ssh/ssh-base.sh
/var/run/cloudera-scm-agent/process/-oozie-OOZIE_SERVER/temp/oozie-oozi4864889223161337030.dir/ssh/ssh-wrapper.sh
root@remotehost:oozie-oozi/0000201-160113124428061-oozie-oozi-W/ShellAction--ssh/
```
It works! But why oozie server could not run 'scp'?
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