FMLE does not work publishing though AMS server connection succeeds

Hello Adobe Support,

Using Adobe Media Server we've run into a problem.

Occasionally "FlashMediaLiveEncoder does not work on publishing, though AMS server connection succeeds."

As soon as clients are connected to AMS, they get disconnected and cannot publish a stream.

After restarting AMS (command: "/opt/adobe/ams/amsmgr server ams restart") it comes back to normal.

Seems amscore hangs up for a while.

AMS version: 5.0.6 r9003 x64

OS: Amazon Linux 6.3

core.00.log below:

2015-01-08      00:53:44        22267   (i)2581247      Core (22267) disconnected from edge.    -

#Date: 2015-01-08#Fields: date   time    x-pid   x-status        x-ctx   x-comment

2015-01-08      00:53:44        6153    (i)2581247      Core (6153) disconnected from edge.     -

2015-01-08      00:54:01        22267   (e)2581279      Assert failed in tincan/util/TCAsyncIO.cpp line 1948    -

We've found two amscores exist in 'ps auwxff' like below when this problem happens. Does this matter?:

Sl 2014 4:32 ./amsmaster -console

Sl 2014 6:07 \_ /opt/adobe/ams/amsedge -edgeports :1936 -coreports 127.0.0.1:19350 -conf /opt/adobe/ams/conf/Server.xml -adaptor _defaultRoot_ -name _defaultRoot__edge1 -edgename edge1

Sl 2014 272:07 \_ /opt/adobe/ams/amscore -adaptor _defaultRoot_ -vhost _defaultVHost_ -app -inst -tag _1 -console -conf /opt/adobe/ams/conf/Server.xml -name _defaultRoot_:_defaultVHost_:::_1

Sl Jan04 1:36 \_ /opt/adobe/ams/amscore -adaptor _defaultRoot_ -vhost _defaultVHost_ -app -inst -tag _2 -console -conf /opt/adobe/ams/conf/Server.xml -name _defaultRoot_:_defaultVHost_:::_2

After restarting AMS only one core exists:

Sl 2014 4:32 ./amsmaster -console 

Sl 2014 6:07 \_ /opt/adobe/ams/amsedge -edgeports :1936 -coreports 127.0.0.1:19350 -conf /opt/adobe/ams/conf/Server.xml -adaptor _defaultRoot_ -name _defaultRoot__edge1 -edgename edge1

Sl 2014 272:23 \_ /opt/adobe/ams/amscore -adaptor _defaultRoot_ -vhost _defaultVHost_ -app -inst -tag _1 -console -conf /opt/adobe/ams/conf/Server.xml -name _defaultRoot_:_defaultVHost_:::_1

pstack of one ams process:

0bin - encrypted pastebin

amscheck tool log. It returns code 64512 "Operation timed out":

0bin - encrypted pastebin

We have gcore files for each amscore process.

Let us know if you want them for investigation.

We want to solve this problem ASAP.

Do you have any idea what is happening here? Any advice would be helpful.

Thanks,

Yusuke