Fix: Add keep-alive options to Redis clients to prevent idle timeouts and socket closing. (#4377)

* redis keepalive mechanism for all redis

* removed offline queue commands

* Simplified changes for consistency. Added REDIS_KEEP_ALIVE env variable.

* update redis socket alive env variable

* lint fix

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Co-authored-by: Henry <hzj94@hotmail.com>
Co-authored-by: Henry Heng <henryheng@flowiseai.com>

packages/server/src/queue/QueueManager.ts

@@ -41,7 +41,12 @@ export class QueueManager {
             port: parseInt(process.env.REDIS_PORT || '6379'),
             username: process.env.REDIS_USERNAME || undefined,
             password: process.env.REDIS_PASSWORD || undefined,
-            tls: tlsOpts
+            tls: tlsOpts,
+            enableReadyCheck: true,
+            keepAlive:
+                process.env.REDIS_KEEP_ALIVE && !isNaN(parseInt(process.env.REDIS_KEEP_ALIVE, 10))
+                    ? parseInt(process.env.REDIS_KEEP_ALIVE, 10)
+                    : undefined
         }
     }