Issue2840

I tried to send an email with jython 2.7.1 and jython 2.7.2b2 with the attached mytest_smtplib.py. The attached image is 85 KiB in size.
The OS is openSUSE Leap 15.1. The java version is 1.8.0_222.

The program fails with:

Traceback (most recent call last):
  File "mytest_smtplib.py", line 40, in <module>
    s.sendmail(sender, receiver, msg.as_string())
  File "/usr/local/jython2.7.1/Lib/smtplib.py", line 745, in sendmail
    self.rset()
  File "/usr/local/jython2.7.1/Lib/smtplib.py", line 469, in rset
    return self.docmd("rset")
  File "/usr/local/jython2.7.1/Lib/smtplib.py", line 393, in docmd
    self.putcmd(cmd, args)
  File "/usr/local/jython2.7.1/Lib/smtplib.py", line 341, in putcmd
    self.send(str)
  File "/usr/local/jython2.7.1/Lib/smtplib.py", line 331, in send
    raise SMTPServerDisconnected('Server not connected')
smtplib.SMTPServerDisconnected: Server not connected

The log of the postfix mailserver shows:

2019-11-25T15:15:58.762073+01:00 dios postfix/smtpd[14421]: connect from localhost[127.0.0.1]
2019-11-25T15:15:59.066917+01:00 dios postfix/smtpd[14421]: 104A2A08C1: client=localhost[127.0.0.1]
2019-11-25T15:15:59.126283+01:00 dios postfix/cleanup[14434]: 104A2A08C1: message-id=<20191125141559.104A2A08C1@dios.nixdos.de>
2019-11-25T15:20:59.227259+01:00 dios postfix/smtpd[14421]: timeout after DATA (65507 bytes) from localhost[127.0.0.1]
2019-11-25T15:20:59.227865+01:00 dios postfix/smtpd[14421]: disconnect from localhost[127.0.0.1] ehlo=1 mail=1 rcpt=1 data=0/1 commands=3/4


But the same program works with python.

I added the picture used as an attachment.

We should be able to do better than that. Aiming for 2.7.2

This is quite likely connected with the incomplete nature of our socket implementation, see for example https://github.com/jythontools/jython/issues/104, and I do not think a fix is feasible in the timescale of the 2.7.2 release.