與網絡失去連接:: SSH :: Perl的

我們有提取數據到CSV，它上傳到另一臺服務器，然後需要連接到其它服務器和呼叫的ETL系統一個java jar將csv加載到memcache中。我有一個腳本可以執行此操作的每一步，但會丟失最後一步的SSH連接。遠程機器上的進程繼續並完成。

我正在使用Net :: SSH :: Perl，並且在短時間運行後收到「連接失敗：由對等方重置連接」錯誤。我煮的腳本到這一點，並複製結果：

#!/usr/bin/perl 

use strict; 
use Net::SSH::Perl; 
use Log::Log4perl; 

my ($stdout, $stderr, $exit, $ssh); 

$ssh = Net::SSH::Perl->new('sshost', 
     identity_files => ['/path/to/key.rsa'], 
     protocol => 2, 
     debug => 1); 

$ssh->login('user'); 

my $cmd = "java -Xms4096m -Xmx4096m -DetlDate=20120427 -DmemcacheHosts=host1,host2 -cp etl-0.1-SNAPSHOT.jar com.nnn.platform.service.etl"; 

$ssh->register_handler("stdout", sub { 
     my($channel, $buffer) = @_; 
     print "STDOUT: ", $buffer->bytes; 
}); 

$ssh->register_handler("stderr", sub { 
     my($channel, $buffer) = @_; 
     print "STDERR: ", $buffer->bytes; 
}); 

$ssh->cmd("cd /usr/local/loader; $cmd");

的SSH調試信息，我得到的是：那麼

localhost: Reading configuration data /home/user/.ssh/config 
localhost: Reading configuration data /etc/ssh_config 
localhost: Connecting to sshost, port 22. 
localhost: Remote protocol version 2.0, remote software version OpenSSH_4.3 
localhost: Net::SSH::Perl Version 1.34, protocol version 2.0. 
localhost: No compat match: OpenSSH_4.3. 
localhost: Connection established. 
localhost: Sent key-exchange init (KEXINIT), wait response. 
localhost: Algorithms, c->s: 3des-cbc hmac-sha1 none 
localhost: Algorithms, s->c: 3des-cbc hmac-sha1 none 
localhost: Entering Diffie-Hellman Group 1 key exchange. 
localhost: Sent DH public key, waiting for reply. 
localhost: Received host key, type 'ssh-dss'. 
localhost: Host 'sshost' is known and matches the host key. 
localhost: Computing shared secret key. 
localhost: Verifying server signature. 
localhost: Waiting for NEWKEYS message. 
localhost: Send NEWKEYS. 
localhost: Enabling encryption/MAC/compression. 
localhost: Sending request for user-authentication service. 
localhost: Service accepted: ssh-userauth. 
localhost: Trying empty user-authentication request. 
localhost: Authentication methods that can continue: publickey,gssapi-with-mic. 
localhost: Next method to try is publickey. 
localhost: Trying pubkey authentication with key file '/path/to/key.rsa' 
localhost: Login completed, opening dummy shell channel. 
localhost: channel 0: new [client-session] 
localhost: Requesting channel_open for channel 0. 
localhost: channel 0: open confirm rwindow 0 rmax 32768 
localhost: Got channel open confirmation, requesting shell. 
localhost: Requesting service shell on channel 0. 
localhost: channel 1: new [client-session] 
localhost: Requesting channel_open for channel 1. 
localhost: Entering interactive session. 
localhost: Sending command: cd /usr/local/loader; java -Xms4096m -Xmx4096m -DetlDate=20120427 -DmemcacheHosts=host1,host2 -cp etl-0.1-SNAPSHOT.jar com.nnn.platform.service.etl 
localhost: Sending command: cd /usr/local/loader; java -Xms4096m -Xmx4096m -DetlDate=20120427 -DmemcacheHosts=host1,host2 -cp etl-0.1-SNAPSHOT.jar com.nnn.platform.service.etl 
localhost: Requesting service exec on channel 1. 
localhost: channel 1: open confirm rwindow 0 rmax 32768

JAR的輸出打印到STDERR，我看到它返回。 9秒後停止，最終通過對等錯誤重置連接。 STDERR處理程序按預期工作。

我不確定這是Net :: SSH :: Perl處理命令需要花費一段時間才能運行/僅通過STDERR或其他更多的問題。我一直在考慮切換到Net :: SSH2，因爲它看起來像一個更全面的特色庫，但我真的很想知道爲什麼這是失敗。

SOLUTION

的問題是與輸出只會STDERR。我編輯了我的命令以添加2>&1，從而將STDERR重定向到STDOUT，並突然一切按預期工作。

來源

2012-05-02 Ilion

問題在於輸出只能進入STDERR。我編輯了我的命令來添加2> & 1，從而將STDERR重定向到STDOUT，並突然一切按預期工作。

my $cmd = "java -Xms4096m -Xmx4096m -DetlDate=20120427 -DmemcacheHosts=host1,host2 -cp etl-0.1-SNAPSHOT.jar com.nnn.platform.service.etl 2>&1";

來源

2012-05-02 14:44:05 Ilion

Net :: SSH :: Perl不再被維護，並有一長串已知的未解決的錯誤。現在可以從CPAN獲得更好的模塊，如Net::SSH2或Net::OpenSSH。

例如：

my $ssh = Net::OpenSSH->new($sshost, 
          user => $user, 
          key_path => '/path/to/key.rsa'); 
my ($out, $err) = $ssh->capture2($cmd);

來源

2012-05-03 08:01:06 salva

與網絡失去連接:: SSH :: Perl的

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