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fix: add Redis connection resilience settings to prevent infinite hangs #5219

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fix: add Redis connection resilience settings to prevent infinite hangs #5219

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bede455
fix: add Redis connection resilience settings to prevent infinite hangs
utsav-bx Sep 15, 2025
7d58067
Merge branch 'main' into bugfix/redis-connection-timeout-fix
utsav-bx Sep 20, 2025
2c21fc4
removed packageManager pinning from package.json
utsav-bx Sep 30, 2025
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8 changes: 8 additions & 0 deletions packages/server/.env.example
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Original file line number Diff line number Diff line change
Expand Up @@ -163,6 +163,14 @@ JWT_REFRESH_TOKEN_EXPIRY_IN_MINUTES=43200
# REDIS_KEY=
# REDIS_CA=
# REDIS_KEEP_ALIVE=

# Redis Connection Resilience Settings (fixes infinite hangs on connection drops)
# REDIS_CONNECT_TIMEOUT=10000 # Connection timeout in milliseconds
# REDIS_COMMAND_TIMEOUT=30000 # Command timeout in milliseconds (prevents waitUntilFinished hanging)
# REDIS_MAX_RETRIES_PER_REQUEST=3 # Maximum retries per Redis command
# REDIS_LAZY_CONNECT=true # Connect only when needed
# REDIS_KEEPALIVE_INTERVAL=30000 # Keep-alive interval in milliseconds

# ENABLE_BULLMQ_DASHBOARD=


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21 changes: 19 additions & 2 deletions packages/server/src/queue/QueueManager.ts
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Expand Up @@ -15,6 +15,13 @@ import { ExpressAdapter } from '@bull-board/express'

const QUEUE_NAME = process.env.QUEUE_NAME || 'flowise-queue'

// Redis resilience configuration with environment variable support
const REDIS_CONNECT_TIMEOUT = process.env.REDIS_CONNECT_TIMEOUT ? parseInt(process.env.REDIS_CONNECT_TIMEOUT, 10) : 10000
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I prefer not to hardcode a default value for these.

If these are set, we only pass it in, if not, we leave it

const REDIS_COMMAND_TIMEOUT = process.env.REDIS_COMMAND_TIMEOUT ? parseInt(process.env.REDIS_COMMAND_TIMEOUT, 10) : 30000
const REDIS_MAX_RETRIES_PER_REQUEST = process.env.REDIS_MAX_RETRIES_PER_REQUEST ? parseInt(process.env.REDIS_MAX_RETRIES_PER_REQUEST, 10) : 3
const REDIS_LAZY_CONNECT = process.env.REDIS_LAZY_CONNECT === 'false' ? false : true
const REDIS_KEEPALIVE_INTERVAL = process.env.REDIS_KEEPALIVE_INTERVAL ? parseInt(process.env.REDIS_KEEPALIVE_INTERVAL, 10) : 30000

type QUEUE_TYPE = 'prediction' | 'upsert'

export class QueueManager {
Expand Down Expand Up @@ -45,7 +52,12 @@ export class QueueManager {
keepAlive:
process.env.REDIS_KEEP_ALIVE && !isNaN(parseInt(process.env.REDIS_KEEP_ALIVE, 10))
? parseInt(process.env.REDIS_KEEP_ALIVE, 10)
: undefined
: REDIS_KEEPALIVE_INTERVAL,
// Enhanced resilience settings
connectTimeout: REDIS_CONNECT_TIMEOUT,
commandTimeout: REDIS_COMMAND_TIMEOUT,
maxRetriesPerRequest: REDIS_MAX_RETRIES_PER_REQUEST,
lazyConnect: REDIS_LAZY_CONNECT
}
} else {
let tlsOpts = undefined
Expand All @@ -66,7 +78,12 @@ export class QueueManager {
keepAlive:
process.env.REDIS_KEEP_ALIVE && !isNaN(parseInt(process.env.REDIS_KEEP_ALIVE, 10))
? parseInt(process.env.REDIS_KEEP_ALIVE, 10)
: undefined
: REDIS_KEEPALIVE_INTERVAL,
// Enhanced resilience settings
connectTimeout: REDIS_CONNECT_TIMEOUT,
commandTimeout: REDIS_COMMAND_TIMEOUT,
maxRetriesPerRequest: REDIS_MAX_RETRIES_PER_REQUEST,
lazyConnect: REDIS_LAZY_CONNECT
}
}
}
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