[jira] [Commented] (SSHD-1112) Cannot return large output from channel.getInvertedOut() in version 2.6.0

["min yun law (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SSHD-1112?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17249987#comment-17249987 ] 

min yun law commented on SSHD-1112:
-----------------------------------

please try download the big zip file from [https://www.oracle.com/database/technologies/oracle-database-software-downloads.html#19c], and the command to run in remote node as:

/usr/bin/unzip -l /u01/LINUX.X64_193000_db_home.zip

 

Actually above code get stuck in  channel.waitFor() with 0L wait time.

 

also here is method to get SshClient that cause the issue in above code

private SshClient getSSHClient()
 {
 SshClient client = SshClient.setUpDefaultClient();

//handle "StrictHostKeyChecking=no" to skip host's public key checking for
 //example the host get imaged often, and OEDA does not access
 // .ssh/known_hosts
 client.setServerKeyVerifier(AcceptAllServerKeyVerifier.INSTANCE);

client.setHostConfigEntryResolver(HostConfigEntryResolver.EMPTY);
 client.setKeyIdentityProvider(KeyIdentityProvider.EMPTY_KEYS_PROVIDER);


 CoreModuleProperties.HEARTBEAT_INTERVAL.set(client, HEARTBEAT);
 CoreModuleProperties.HEARTBEAT_REPLY_WAIT.set(client, HEARTBEATREPLYWAIT);

//if no IDLE_TIMEOUT and READ_TIMEOUT, it can pass the unzip -l command

//but give incomplete content of the zip file, but if enable TIMEOUT, get stuck  

CoreModuleProperties.IDLE_TIMEOUT.set(client, IDLETIMEOUT);
 CoreModuleProperties.NIO2_READ_TIMEOUT.set(client,
 IDLETIMEOUT.plusMinutes(10L));

return client;
 }

Check the comment for the TIMEOUT code, which if disable this two lines, it pass the channel.waitFor(), but the return result of unzip -l is not complete, and no return code, and   Collection<ClientChannelEvent> waitMask  has only two status [CLOSED, OPENED]

 

> Cannot return large output from channel.getInvertedOut() in version 2.6.0
> -------------------------------------------------------------------------
>
>                 Key: SSHD-1112
>                 URL: https://issues.apache.org/jira/browse/SSHD-1112
>             Project: MINA SSHD
>          Issue Type: Bug
>    Affects Versions: 2.6.0
>            Reporter: min yun law
>            Priority: Major
>
> The mina sshd version is 2.6.0 from github
> try to run the linux command "unzip -l bigzipfile.zip" in remote node, where the bigzipfile.zip had lots of files and folders which packed as one big zip file. the channel get stuck for a while and return exception : Pipe closed after 0 cycles
>  
> Here is sample code:
> String getExecCommandResult(ClientChannel channel)
> {
>         channel.open().await();
>         Collection<ClientChannelEvent> waitMask = channel.waitFor(
>  EnumSet.of(ClientChannelEvent.CLOSED, ClientChannelEvent.EXIT_STATUS,
>  ClientChannelEvent.EXIT_SIGNAL, ClientChannelEvent.EOF),
>  0L //no TIMEOUT status returned if 0L
>  );
>      
> InputStream in = channel.getInvertedOut();
>  String outputStr = "";
>  if(in != null)
> {
> outputStr = readStream(in);  //this is place that get stuck and exception is thrown
>  }
> return outputStr;
> }
>  
> String readStream(InputStream inputStream)
>  {
>  String line = null;
>  String m_cmdOutput = "";
> try (BufferedReader bufReader = new BufferedReader(
>  new InputStreamReader(inputStream)))
>  {
>  while ((line = bufReader.readLine()) != null)
>  {
>  m_cmdOutput += line + Constants.getDelimiter();
>  }
>  }
>  catch (Exception ex)
>  {
>  //output the exception
>  }
> return m_cmdOutput;
> }
>  
>  



--
This message was sent by Atlassian Jira
(v8.3.4#803005)

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@mina.apache.org
For additional commands, e-mail: dev-help@mina.apache.org