[jira] [Created] (SSHD-916) Followup of Review usages of AbstractCloseable#lock and constrain them only to actually needed ones

[Roberto Deandrea (JIRA)]

Roberto Deandrea created SSHD-916:
-------------------------------------

             Summary: Followup of Review usages of AbstractCloseable#lock and 
constrain them only to actually needed ones
                 Key: SSHD-916
                 URL: https://issues.apache.org/jira/browse/SSHD-916
             Project: MINA SSHD
          Issue Type: Bug
    Affects Versions: 2.2.0
            Reporter: Roberto Deandrea
         Attachments: spxp.usrdump.9503...@aix72.dmz.20190510114505768.log

Hi Lyor,

Yesterday I said you that no deadlock occurred with the new code changes, but I 
spoke too early.... :(

I found a third thread deadlock on SSH client running our long run test always 
during client/server disconnection.

 

The deadlock is as follows :

Thread #22175 name: sshd-SshClient[ad946082]-nio2-thread-2

— 
org.apache.sshd.common.session.helpers.AbstractSession.doWritePacket(AbstractSession.java:873)
 WAITFOR(encodedLock)

................

— 
org.apache.sshd.common.session.helpers.AbstractSession.handleMessage(AbstractSession.java:362)
 LOCKED(sessionLock)

 

Thread #22180 name: sshd-SshClient[ad946082]-nio2-thread-7

— 
org.apache.sshd.client.session.ClientSessionImpl.signalAuthFailure(ClientSessionImpl.java:151)
  WAITFOR(sessionLock)

.................

— 
org.apache.sshd.common.session.helpers.AbstractSession.doWritePacket(AbstractSession.java:876)
 LOCKED(encodedLock)

 

Attached you can find a full thread dump regarding the new deadlock. (see file 
spxp.usrdump.9503...@aix72.dmz.20190510114505768.log)

Let me know if you prefer open a new ticket and troubleshoot this issue.

 

Kind Regards

Roberto Deandrea



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