Bug 1372193

+++ This bug was initially created as a clone of Bug #1340756 +++

Description of problem:
=======================

During tarssh syncup and rmdir from Master nfs client, following traceback is seen on one of the master nodes:

[2016-05-29 22:40:09.701273] I [master(/bricks/brick0/master_brick1):1192:crawl] _GMaster: slave's time: (1464560999, 0)
[2016-05-29 22:40:10.335872] I [syncdutils(/bricks/brick1/master_brick6):220:finalize] <top>: exiting.
[2016-05-29 22:40:10.336153] E [syncdutils(/bricks/brick0/master_brick1):276:log_raise_exception] <top>: FAIL: 
Traceback (most recent call last):
  File "/usr/libexec/glusterfs/python/syncdaemon/syncdutils.py", line 306, in twrap
    tf(*aa)
  File "/usr/libexec/glusterfs/python/syncdaemon/master.py", line 1575, in syncjob
    po.errfail()
  File "/usr/libexec/glusterfs/python/syncdaemon/resource.py", line 242, in errfail
    self.errlog()
  File "/usr/libexec/glusterfs/python/syncdaemon/resource.py", line 223, in errlog
    if self.elines:
AttributeError: 'Popen' object has no attribute 'elines'
[2016-05-29 22:40:10.336755] E [syncdutils(/bricks/brick0/master_brick1):252:log_raise_exception] <top>: connection to peer is broken
[2016-05-29 22:40:10.340313] E [resource(/bricks/brick0/master_brick1):226:errlog] Popen: command "ssh -oPasswordAuthentication=no -oStrictHostKeyChecking=no -i /var/lib/glusterd/geo-replication/secret.pem -p 22 -oControlMaster=auto -S /tmp/gsyncd-aux-ssh-jsxe5z/55c207f77f58e7b6352df3f6f7e6779b.sock root.37.88 /nonexistent/gsyncd --session-owner 4f616379-ac10-4dde-a8c8-1a8c5dfb71f8 -N --listen --timeout 120 gluster://localhost:slave" returned with 255, saying:
[2016-05-29 22:40:10.341049] E [resource(/bricks/brick0/master_brick1):230:logerr] Popen: ssh> [2016-05-29 22:30:00.731420] I [cli.c:721:main] 0-cli: Started running /usr/sbin/gluster with version 3.7.9


How reproducible:
=================

Seen only once, not sure about the occurrence. Will update BZ if observe again. 


Steps to Reproduce:
===================
1. Geo-Rep automated cases which does create,rmdir and other fops. Client: NFS protocol and Sync: tarssh

--- Additional comment from Jeff on 2016-07-13 17:46:03 EDT ---

I am receiving the same error

[2016-07-13 19:25:52.16657] I [master(/srv/gluster):1192:crawl] _GMaster: slave's time: (1468363119, 0)
[2016-07-13 19:25:52.583666] E [syncdutils(/srv/gluster):276:log_raise_exception] <top>: FAIL: 
Traceback (most recent call last):
  File "/usr/lib/x86_64-linux-gnu/glusterfs/python/syncdaemon/syncdutils.py", line 306, in twrap
    tf(*aa)
  File "/usr/lib/x86_64-linux-gnu/glusterfs/python/syncdaemon/master.py", line 1575, in syncjob
    po.errfail()
  File "/usr/lib/x86_64-linux-gnu/glusterfs/python/syncdaemon/resource.py", line 242, in errfail
    self.errlog()
  File "/usr/lib/x86_64-linux-gnu/glusterfs/python/syncdaemon/resource.py", line 223, in errlog
    if self.elines:
AttributeError: 'Popen' object has no attribute 'elines'
[2016-07-13 19:25:52.585411] I [syncdutils(/srv/gluster):220:finalize] <top>: exiting.
[2016-07-13 19:25:52.588901] I [repce(agent):92:service_loop] RepceServer: terminating on reaching EOF.
[2016-07-13 19:25:52.589368] I [syncdutils(agent):220:finalize] <top>: exiting.
[2016-07-13 19:25:52.928951] I [monitor(monitor):343:monitor] Monitor: worker(/srv/gluster) died in startup phase

geo-replication status is Faulty and it appears as if the gsyncd.py process is unable to start on the slave server.

gluster-server 3.7.11-1~bpo8+1 on Debian 8.

--- Additional comment from Jeff on 2016-07-14 19:59:55 EDT ---

The error I was receiving was due to rsync not being installed on the slave server.

--- Additional comment from Rahul Hinduja on 2016-08-31 12:29:00 EDT ---

While trying one of the rm case on cascading cases(private build based on 3.1.0+patches), I could reproduce this issue by following steps:

1. Create geo-rep cascaded setup with (vol0,vol1,vol2). Such that vol0=>vol1, vol1=>vol2
2. Mount the vol0 volume and perform:
[root@fan data]# for i in {1..100}; do cp -rf /root/data/new_data/* . ; sleep 5 ; rm -rf * ; sleep 2 ; done
[root@fan data]#

Following traceback on one of the master is seen:

[2016-08-31 16:20:55.410460] E [syncdutils(/rhs/brick2/b3):276:log_raise_exception] <top>: FAIL: 
Traceback (most recent call last):
  File "/usr/libexec/glusterfs/python/syncdaemon/syncdutils.py", line 306, in twrap
    tf(*aa)
  File "/usr/libexec/glusterfs/python/syncdaemon/master.py", line 1530, in syncjob
    po.errfail()
  File "/usr/libexec/glusterfs/python/syncdaemon/resource.py", line 242, in errfail
    self.errlog()
  File "/usr/libexec/glusterfs/python/syncdaemon/resource.py", line 223, in errlog
    if self.elines:
AttributeError: 'Popen' object has no attribute 'elines'
[2016-08-31 16:20:55.415150] I [syncdutils(/rhs/brick2/b3):220:finalize] <top>: exiting.