SRDF SRA error while adding array pair: SRA command 'discoverArrays' failed. Failed to connect to the array management host

The following error displays while adding an array pair using Symmetrix Remote Data Facility (SRDF) Replication Adapter (SRA):

SRA command ‘discoverArrays’ failed. Failed to connect to the array management host. Please check EmcSrdfSra logs for more information on the error.

 

Additional Information about the configuration where this issue was seen:

• vCenter version: 6.7
• SRM version: 8.1
• SRA version: 9.2.0
• SE version: 9.2.1 client installed on SRM
• SYMAPI Server: Embedded Managed Array with SE 9.2.1

The SYMAPI session could not be initialized from the SRM Client to the SYMAPI server due to the error:
The maximum number of network connections has been reached on the server.

This means that the SRM client could be making more than 100 connections (by default and maximum) to the SYMAPI Server (storsrvd).

Error found in the EmcSrdfSra.log:

[07/21 06:13:53.779  5264   155 SymapiSession::Init             ] [ERROR]: Failed to perform SymInit(). 

[ERROR]: [SYMAPI_C_SRVR_CONNECTS_EXCEEDED : The maximum number of network connections has been reached on the server]
.
.
[07/21 06:13:53.779  5264   366 MessageFormatter::setMarker     ] _______Backtrace end_______
[07/21 06:13:53.779  5264    33 SymapiSession::SymapiSession    ] [ERROR]: Failed to initialize Symapi session
[07/21 06:13:53.779  5264   366 MessageFormatter::setMarker     ] _______Backtrace begin_______
[07/21 06:13:53.779  5264   264 SymapiSession::Init             ] Exit
[07/21 06:13:53.779  5264   366 MessageFormatter::setMarker     ] _______Backtrace end_______
[07/21 06:13:53.779  5264   590 SymmUtil::DisplaySEVersion      ] [ERROR]: Failed to fetch SE version information
[07/21 06:13:53.779  5264   366 MessageFormatter::setMarker     ] _______Backtrace begin_______
[07/21 06:13:53.779  5264   664 SymmUtil::GetSEVersion          ] Exit

Error found in the SYMAPI server storsrvd.log:

<Error> [26815            SESS 0001] Jul-27 15:46:17.992 : ANR0018E Rejecting session 1 for dell_user@dellemc123.abc.def.com (::ffff:111.222.333.444): The maximum number of network connections has been reached on the server

Seeing the error entry in the storsrvd.log into the SYMAPI server, it was found that the first session (session 1) from SRM client dellemc123.abc.def.com using user dell_user was rejected by the storsrvd daemon on the SYMAPI server.

When the daemon_options file was checked on the SYMAPI server, it was found that the storsrvd:max_sessions parameter was set to 0.
This is why the first client was rejected.

1. Modify the daemon_options parameter storsrvd:max_sessions to default (100) either by putting a # in front of the parameter or changing the parameter to storsrvd:max_sessions = 100.

or

2. Once the changes are made, restart the storsrvd daemon.

stordaemon shutdown storsrvd -immediate
stordaemon start storsrvd

3. Perform the Add Array Pair operation in the SRM user interface (UI).