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https://issues.apache.org/jira/browse/VFS-766?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17067301#comment-17067301
]
Jasper Teng commented on VFS-766:
---------------------------------
Codes that can be used to reproduce issue on 2.6.0.
{code:java}
String usr = "myuser";
String pwd = "mypass";
String url = "sftp://mask.mask.mask:22";;
FileSystemManager fsManager = VFS.getManager();
FileSystemOptions fsOptions = new FileSystemOptions();
StaticUserAuthenticator auth = new StaticUserAuthenticator("", usr, pwd);
DefaultFileSystemConfigBuilder.getInstance().setUserAuthenticator(fsOptions,
auth);
SftpFileSystemConfigBuilder.getInstance().setStrictHostKeyChecking(fsOptions,
"no");
SftpFileSystemConfigBuilder.getInstance().setUserDirIsRoot(fsOptions, false);
URI uri = new URI(url);
FileObject vfsFile = fsManager.resolveFile(uri.toString(), fsOptions);
System.out.println("this should print, but it doesn't");
{code}
> SftpClientFactory hangs at FileSystemManager.resolveFile(...)
> -------------------------------------------------------------
>
> Key: VFS-766
> URL: https://issues.apache.org/jira/browse/VFS-766
> Project: Commons VFS
> Issue Type: Bug
> Affects Versions: 2.5.0, 2.6.0
> Reporter: Jasper Teng
> Priority: Critical
>
> Issue: When trying to sftp, it hangs inside
> FileSystemManager.resolveFile(...).
>
> Libs in classpath used for testing:
> * commons-vfs2-2.6.0.jar / commons-vfs2-2.5.0.jar
> * commons-vfs2-jackrabbit2-2.5.0.jar
> * jackrabbit-webdav-2.20.0.jar
>
> Issue Log file (2.5.0 + Server X):
> {noformat}
> 25 Mar, 20:00:37,825 INFO main [SftpClientFactory$JSchLogger.log()]
> [65017ms] Connection established
> 25 Mar, 20:00:38,013 INFO main [SftpClientFactory$JSchLogger.log()]
> [65205ms] Remote version string: SSH-2.0-ProVide
> 25 Mar, 20:00:38,017 INFO main [SftpClientFactory$JSchLogger.log()]
> [65209ms] Local version string: SSH-2.0-JSCH-0.1.52
> ...snip...
> 25 Mar, 20:01:02,802 INFO main [SftpClientFactory$JSchLogger.log()]
> [89994ms] kex: server->client aes128-ctr hmac-md5 none
> 25 Mar, 20:01:02,809 INFO main [SftpClientFactory$JSchLogger.log()]
> [90001ms] kex: client->server aes128-ctr hmac-md5 none
> 25 Mar, 20:01:06,359 INFO main [SftpClientFactory$JSchLogger.log()]
> [93551ms] SSH_MSG_KEXDH_INIT sent
> 25 Mar, 20:01:06,363 INFO main [SftpClientFactory$JSchLogger.log()]
> [93555ms] expecting SSH_MSG_KEXDH_REPLY
> 25 Mar, 20:01:10,410 INFO main [SftpClientFactory$JSchLogger.log()]
> [97602ms] ssh_rsa_verify: signature true
> 25 Mar, 20:01:10,427 WARN main [SftpClientFactory$JSchLogger.log()]
> [97619ms] Permanently added 'mask.mask.mask' (RSA) to the list of known hosts.
> 25 Mar, 20:01:10,438 INFO main [SftpClientFactory$JSchLogger.log()]
> [97630ms] SSH_MSG_NEWKEYS sent
> 25 Mar, 20:01:10,625 INFO main [SftpClientFactory$JSchLogger.log()]
> [97817ms] SSH_MSG_NEWKEYS received
> 25 Mar, 20:01:10,709 INFO main [SftpClientFactory$JSchLogger.log()]
> [97901ms] SSH_MSG_SERVICE_REQUEST sent
> 25 Mar, 20:01:10,897 INFO main [SftpClientFactory$JSchLogger.log()]
> [98089ms] SSH_MSG_SERVICE_ACCEPT received
> 25 Mar, 20:01:11,098 INFO main [SftpClientFactory$JSchLogger.log()]
> [98290ms] Authentications that can continue:
> publickey,keyboard-interactive,password
> 25 Mar, 20:01:11,102 INFO main [SftpClientFactory$JSchLogger.log()]
> [98294ms] Next authentication method: publickey
> 25 Mar, 20:01:11,114 INFO main [SftpClientFactory$JSchLogger.log()]
> [98306ms] Authentications that can continue: password
> 25 Mar, 20:01:11,119 INFO main [SftpClientFactory$JSchLogger.log()]
> [98311ms] Next authentication method: password
> 25 Mar, 20:01:11,735 INFO main [SftpClientFactory$JSchLogger.log()]
> [98927ms] Authentication succeeded (password).{noformat}
>
> Issue Log file (2.6.0 + Server X):
> {noformat}
> 26 Mar, 09:42:07,781 INFO main [SftpClientFactory$JSchLogger.log()]
> [20400ms] Connection established
> 26 Mar, 09:42:07,971 INFO main [SftpClientFactory$JSchLogger.log()]
> [20590ms] Remote version string: SSH-2.0-ProVide
> 26 Mar, 09:42:07,975 INFO main [SftpClientFactory$JSchLogger.log()]
> [20594ms] Local version string: SSH-2.0-JSCH-0.1.52
> ...snip...
> 26 Mar, 09:42:33,250 INFO main [SftpClientFactory$JSchLogger.log()]
> [45869ms] kex: server->client aes128-ctr hmac-md5 none
> 26 Mar, 09:42:33,258 INFO main [SftpClientFactory$JSchLogger.log()]
> [45877ms] kex: client->server aes128-ctr hmac-md5 none
> 26 Mar, 09:42:36,710 INFO main [SftpClientFactory$JSchLogger.log()]
> [49329ms] SSH_MSG_KEXDH_INIT sent
> 26 Mar, 09:42:36,716 INFO main [SftpClientFactory$JSchLogger.log()]
> [49335ms] expecting SSH_MSG_KEXDH_REPLY
> 26 Mar, 09:42:40,635 INFO main [SftpClientFactory$JSchLogger.log()]
> [53254ms] ssh_rsa_verify: signature true
> 26 Mar, 09:42:40,653 INFO main [SftpClientFactory$JSchLogger.log()]
> [53272ms] Host 'mask.mask.mask' is known and matches the RSA host key
> 26 Mar, 09:42:40,660 INFO main [SftpClientFactory$JSchLogger.log()]
> [53279ms] SSH_MSG_NEWKEYS sent
> 26 Mar, 09:42:40,845 INFO main [SftpClientFactory$JSchLogger.log()]
> [53464ms] SSH_MSG_NEWKEYS received
> 26 Mar, 09:42:40,953 INFO main [SftpClientFactory$JSchLogger.log()]
> [53572ms] SSH_MSG_SERVICE_REQUEST sent
> 26 Mar, 09:42:41,153 INFO main [SftpClientFactory$JSchLogger.log()]
> [53772ms] SSH_MSG_SERVICE_ACCEPT received
> 26 Mar, 09:42:41,356 INFO main [SftpClientFactory$JSchLogger.log()]
> [53975ms] Authentications that can continue:
> publickey,keyboard-interactive,password
> 26 Mar, 09:42:41,359 INFO main [SftpClientFactory$JSchLogger.log()]
> [53978ms] Next authentication method: publickey
> 26 Mar, 09:42:41,370 INFO main [SftpClientFactory$JSchLogger.log()]
> [53989ms] Authentications that can continue: password
> 26 Mar, 09:42:41,374 INFO main [SftpClientFactory$JSchLogger.log()]
> [53993ms] Next authentication method: password
> 26 Mar, 09:42:42,388 INFO main [SftpClientFactory$JSchLogger.log()]
> [55007ms] Authentication succeeded (password).
> {noformat}
>
> Additional Important Notes:
> * commons-vfs2-2.4.1.jar works
> * issues can only be reproduced on certain sftp servers
>
> Non issue log file (2.4.1 + Server X):
> {noformat}
> 26 Mar, 09:56:29,747 INFO main [SftpClientFactory$JSchLogger.log()]
> [25083ms] Connection established
> 26 Mar, 09:56:29,948 INFO main [SftpClientFactory$JSchLogger.log()]
> [25284ms] Remote version string: SSH-2.0-ProVide
> 26 Mar, 09:56:29,961 INFO main [SftpClientFactory$JSchLogger.log()]
> [25297ms] Local version string: SSH-2.0-JSCH-0.1.52
> ...snip...
> 26 Mar, 09:56:57,870 INFO main [SftpClientFactory$JSchLogger.log()]
> [53206ms] kex: server->client aes128-ctr hmac-md5 none
> 26 Mar, 09:56:57,874 INFO main [SftpClientFactory$JSchLogger.log()]
> [53210ms] kex: client->server aes128-ctr hmac-md5 none
> 26 Mar, 09:57:01,314 INFO main [SftpClientFactory$JSchLogger.log()]
> [56650ms] SSH_MSG_KEXDH_INIT sent
> 26 Mar, 09:57:01,318 INFO main [SftpClientFactory$JSchLogger.log()]
> [56654ms] expecting SSH_MSG_KEXDH_REPLY
> 26 Mar, 09:57:05,237 INFO main [SftpClientFactory$JSchLogger.log()]
> [60573ms] ssh_rsa_verify: signature true
> 26 Mar, 09:57:05,253 INFO main [SftpClientFactory$JSchLogger.log()]
> [60589ms] Host 'mask.mask.mask' is known and matches the RSA host key
> 26 Mar, 09:57:05,258 INFO main [SftpClientFactory$JSchLogger.log()]
> [60594ms] SSH_MSG_NEWKEYS sent
> 26 Mar, 09:57:05,444 INFO main [SftpClientFactory$JSchLogger.log()]
> [60780ms] SSH_MSG_NEWKEYS received
> 26 Mar, 09:57:05,526 INFO main [SftpClientFactory$JSchLogger.log()]
> [60862ms] SSH_MSG_SERVICE_REQUEST sent
> 26 Mar, 09:57:05,713 INFO main [SftpClientFactory$JSchLogger.log()]
> [61049ms] SSH_MSG_SERVICE_ACCEPT received
> 26 Mar, 09:57:05,911 INFO main [SftpClientFactory$JSchLogger.log()]
> [61247ms] Authentications that can continue:
> publickey,keyboard-interactive,password
> 26 Mar, 09:57:05,915 INFO main [SftpClientFactory$JSchLogger.log()]
> [61251ms] Next authentication method: publickey
> 26 Mar, 09:57:05,927 INFO main [SftpClientFactory$JSchLogger.log()]
> [61263ms] Authentications that can continue: password
> 26 Mar, 09:57:05,931 INFO main [SftpClientFactory$JSchLogger.log()]
> [61267ms] Next authentication method: password
> 26 Mar, 09:57:06,567 INFO main [SftpClientFactory$JSchLogger.log()]
> [61903ms] Authentication succeeded (password).{noformat}
> Non issue log file (2.6.0 + Server A):
> {noformat}
> 26 Mar, 09:47:39,035 INFO main [SftpClientFactory$JSchLogger.log()] [1778ms]
> Connection established
> 26 Mar, 09:47:39,045 INFO main [SftpClientFactory$JSchLogger.log()] [1788ms]
> Remote version string: SSH-2.0-OpenSSH_6.2
> 26 Mar, 09:47:39,045 INFO main [SftpClientFactory$JSchLogger.log()] [1788ms]
> Local version string: SSH-2.0-JSCH-0.1.52
> ...snip...
> 26 Mar, 09:47:41,603 INFO main [SftpClientFactory$JSchLogger.log()] [4346ms]
> kex: server->client aes128-ctr hmac-md5 none
> 26 Mar, 09:47:41,604 INFO main [SftpClientFactory$JSchLogger.log()] [4347ms]
> kex: client->server aes128-ctr hmac-md5 none
> 26 Mar, 09:47:41,607 INFO main [SftpClientFactory$JSchLogger.log()] [4350ms]
> SSH_MSG_KEXDH_INIT sent
> 26 Mar, 09:47:41,607 INFO main [SftpClientFactory$JSchLogger.log()] [4350ms]
> expecting SSH_MSG_KEXDH_REPLY
> 26 Mar, 09:47:41,615 INFO main [SftpClientFactory$JSchLogger.log()] [4358ms]
> ssh_rsa_verify: signature true
> 26 Mar, 09:47:41,616 INFO main [SftpClientFactory$JSchLogger.log()] [4359ms]
> Host 'mask.mask.mask' is known and matches the RSA host key
> 26 Mar, 09:47:41,616 INFO main [SftpClientFactory$JSchLogger.log()] [4359ms]
> SSH_MSG_NEWKEYS sent
> 26 Mar, 09:47:41,616 INFO main [SftpClientFactory$JSchLogger.log()] [4359ms]
> SSH_MSG_NEWKEYS received
> 26 Mar, 09:47:41,621 INFO main [SftpClientFactory$JSchLogger.log()] [4364ms]
> SSH_MSG_SERVICE_REQUEST sent
> 26 Mar, 09:47:41,621 INFO main [SftpClientFactory$JSchLogger.log()] [4364ms]
> SSH_MSG_SERVICE_ACCEPT received
> 26 Mar, 09:47:41,626 INFO main [SftpClientFactory$JSchLogger.log()] [4369ms]
> Authentications that can continue: publickey,keyboard-interactive,password
> 26 Mar, 09:47:41,626 INFO main [SftpClientFactory$JSchLogger.log()] [4369ms]
> Next authentication method: publickey
> 26 Mar, 09:47:41,627 INFO main [SftpClientFactory$JSchLogger.log()] [4370ms]
> Authentications that can continue: keyboard-interactive,password
> 26 Mar, 09:47:41,627 INFO main [SftpClientFactory$JSchLogger.log()] [4370ms]
> Next authentication method: keyboard-interactive
> 26 Mar, 09:47:41,635 INFO main [SftpClientFactory$JSchLogger.log()] [4378ms]
> Authentication succeeded (keyboard-interactive).{noformat}
>
>
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