Application hanging on libssh2_session_disconnect

[Tamar Sery (BLOOMBERG/ 120 PARK)]

Hi, 
I seem to be having a similar issue as 
:https://www.libssh2.org/mail/libssh2-devel-archive-2011-12/0021.shtml
In my case the application is not crashing, but that specific thread just hangs 
forever. 

After the libssh2_sftp_opendir call fails, should I perform any check before 
trying to close the connection? 
Should I be calling connection_status method from 
https://www.libssh2.org/mail/libssh2-devel-archive-2011-12/att-0021/sftp.c and 
just skip closing the connection if the connection is already lost? Is there 
anything else I could do to avoid the thread hanging?

libssh2 version: 1.7.0

Code snippet:
sftpHandle_ = libssh2_sftp_opendir(sftpSession_, 
remoteWorkingDirectory_.c_str());
if(!sftpHandle_) {
    std::cout<< "Unable to open dir with SFTP : "
       << remoteWorkingDirectory_
       << std::endl;
    std::cout << "Shutting down SFTP..."<< std::endl;
    if (sftpSession_ != NULL )
    {
        std::cout << "Shutdown SFTP connection"<< std::endl;
        libssh2_sftp_shutdown(sftpSession_);
        std::cout << "Done shutting down SFTP connection"<< std::endl;
        sftpSession_ = NULL;
        std::cout << "Done resetting SFTP connection"<< std::endl;
    }
    std::cout << "Done shutting down SFTP"<< std::endl;

    std::cout << "Shutting down SSH..."<< std::endl;
    if (!sshSession_)
    {
        std::cout << "Done shutting down SSH connection , ssh session was 
NULL"<< std::endl;
        return;
    }
    std::cout << "Disconnecting SSH connection..."<< std::endl;
    libssh2_session_disconnect(sshSession_, "Normal Shutdown");
    std::cout << "Free SSH session..."<< std::endl;
    libssh2_session_free(sshSession_);
}

Example output:
2020-08-24 22:49:28.512 [T13]:Unable to open dir with SFTP : my_test_dir
2020-08-24 22:49:28.512 [T13]:Shutting down SFTP...
2020-08-24 22:49:28.512 [T13]:Shutdown SFTP connection
2020-08-24 22:49:28.512 [T13]:Done shutting down SFTP connection
2020-08-24 22:49:28.512 [T13]:Done resetting SFTP connection
2020-08-24 22:49:28.512 [T13]:Done shutting down SFTP
2020-08-24 22:49:28.512 [T13]:Shutting down SSH...
2020-08-24 22:49:28.512 [T13]:Disconnecting SSH connection...


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