Frequent "Connection dropped" errors

I am trying to migrate to a gRPC client and am running into frequent “Connection lost” errors.

I’ve setup a connection:

   const options = config.isDev ? 'tls=false' : `tls=true&tlsCAFile=${eventStoreCertPath}`
   this.connection = eventStoreClient.connectionString(
         `esdb+discover://${username}:${password}@${host}:2113?${options}`)

And I have multiple subscriptions:

			const sub = this.connection.subscribeToStream(name, {
				fromRevision: subscription.lastEventVersion,
				resolveLinkTos: true,
			})
			try {
				for await (const resolvedEvent of sub) {
					await this.onCatchUpEventAppeared(resolvedEvent, subscription)
				}
			} catch (err) {
				await this.onSubscriptionDropped(subscription, err.message, err)
			}

Sometimes it works for a while without errors. But usually, i get “UnavailableError” every 15 min.
“14 UNAVAILABLE: Connection dropped”.
There is nothing in the EventStore error log.
I’ve tried “3.4.0” and “4.0.0” db-client versions.
21.10.2-bionic and 21.10.5-bionic EventStore versions.
I tried to increase timeout: “keepAliveTimeout=60000&keepAliveInterval=60000”.
Is there a way to fix this? Perhaps I missed some connection options?

That could point to some networking issue .
Anything between the application hosting the client & the database ?

There is nothing special.
Also, I have the same issue when connecting to local EventStore (in docker).

could you enable client side logs : https://github.com/EventStore/EventStore-Client-NodeJS#debugging

also what version of the database are you running

Event Store 21.10.5.0

  esdb:connection Using connection string: esdb+discover://localhost:2113?tls=false +0ms
  esdb:connection Using insecure channel +4ms
  esdb:connection Starting discovery for candidates: [ { address: 'localhost', port: 2113 } ] +501ms
  esdb:connection Determining best node with preference "leader" from members: [
  esdb:connection   {
  esdb:connection     instanceId: '654cf4b5-42ca-4ad7-aa86-d401bac78e0e',
  esdb:connection     timeStamp: 16632425231817060,
  esdb:connection     state: 8,
  esdb:connection     isAlive: true,
  esdb:connection     httpEndpoint: { address: '127.0.0.1', port: 2113 }
  esdb:connection   }
  esdb:connection ] +58ms
  esdb:connection Chose member: {
  esdb:connection   instanceId: '654cf4b5-42ca-4ad7-aa86-d401bac78e0e',
  esdb:connection   timeStamp: 16632425231817060,
  esdb:connection   state: 8,
  esdb:connection   isAlive: true,
  esdb:connection   httpEndpoint: { address: '127.0.0.1', port: 2113 }
  esdb:connection } +0ms
  esdb:connection Connecting to http://127.0.0.1:2113 +1ms
  esdb:connection Createing client for readStream +307ms
  esdb:connection Using existing connection +0ms
  esdb:connection Using existing grpc client for readStream +0ms
  esdb:connection Using existing grpc client for readStream +1ms
  esdb:connection Using existing grpc client for readStream +18ms
  esdb:connection Using existing grpc client for readStream +1ms
  esdb:connection Using existing grpc client for readAll +2ms
  esdb:connection Using existing grpc client for readAll +1ms
  esdb:connection Using existing grpc client for readStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +17ms
  esdb:connection Using existing grpc client for subscribeToStream +4ms
  esdb:connection Using existing grpc client for subscribeToStream +3ms
  esdb:connection Using existing grpc client for subscribeToStream +3ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +3ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +4ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for readStream +7ms
  esdb:connection Using existing grpc client for subscribeToStream +7ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToAll +5ms
  esdb:connection Using existing grpc client for subscribeToStream +8ms
  esdb:connection Using existing grpc client for subscribeToStream +3ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +3ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +9ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +3ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +3ms
  esdb:connection Using existing grpc client for readStream +4ms
  esdb:connection Using existing grpc client for subscribeToStream +11ms
  esdb:connection Using existing grpc client for subscribeToStream +3ms
  esdb:connection Using existing grpc client for subscribeToStream +3ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToAll +11ms
  esdb:connection Using existing grpc client for subscribeToStream +25ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms

  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +23m
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +1ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +1ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +1ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +1ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +1ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +1ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +1ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +1ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Reconnection required +11ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +1ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +1ms
  esdb:connection Reconnection required +0ms
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  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +1ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +1ms
  esdb:connection Reconnection required +0ms
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  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +1ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +1ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +1ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +0ms
  esdb:connection Starting discovery for candidates: [ { address: 'localhost', port: 2113 } ] +502ms
  esdb:connection Determining best node with preference "leader" from members: [
  esdb:connection   {
  esdb:connection     instanceId: '654cf4b5-42ca-4ad7-aa86-d401bac78e0e',
  esdb:connection     timeStamp: 16632425231817060,
  esdb:connection     state: 8,
  esdb:connection     isAlive: true,
  esdb:connection     httpEndpoint: { address: '127.0.0.1', port: 2113 }
  esdb:connection   }
  esdb:connection ] +8ms
  esdb:connection Chose member: {
  esdb:connection   instanceId: '654cf4b5-42ca-4ad7-aa86-d401bac78e0e',
  esdb:connection   timeStamp: 16632425231817060,
  esdb:connection   state: 8,
  esdb:connection   isAlive: true,
  esdb:connection   httpEndpoint: { address: '127.0.0.1', port: 2113 }
  esdb:connection } +1ms
  esdb:connection Connecting to http://127.0.0.1:2113 +0ms
  esdb:connection Createing client for readAll +1ms
  esdb:connection Using existing connection +1ms
  esdb:connection Using existing grpc client for readAll +0ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +3ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToAll +61ms
  esdb:connection Using existing grpc client for subscribeToAll +1ms

  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +22m
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +1ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +1ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +1ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +1ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +1ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +1ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +1ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +1ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Got reconnection error 14 UNAVAILABLE: Connection dropped +0ms
  esdb:connection Reconnection required +11ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +1ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +1ms
  esdb:connection Reconnection required +0ms
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  esdb:connection Reconnection required +1ms
  esdb:connection Reconnection required +0ms
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  esdb:connection Reconnection required +1ms
  esdb:connection Reconnection required +0ms
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  esdb:connection Reconnection required +1ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +1ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +1ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +0ms
  esdb:connection Reconnection required +0ms
  esdb:connection Starting discovery for candidates: [ { address: 'localhost', port: 2113 } ] +502ms
  esdb:connection Determining best node with preference "leader" from members: [
  esdb:connection   {
  esdb:connection     instanceId: '654cf4b5-42ca-4ad7-aa86-d401bac78e0e',
  esdb:connection     timeStamp: 16632425231817060,
  esdb:connection     state: 8,
  esdb:connection     isAlive: true,
  esdb:connection     httpEndpoint: { address: '127.0.0.1', port: 2113 }
  esdb:connection   }
  esdb:connection ] +8ms
  esdb:connection Chose member: {
  esdb:connection   instanceId: '654cf4b5-42ca-4ad7-aa86-d401bac78e0e',
  esdb:connection   timeStamp: 16632425231817060,
  esdb:connection   state: 8,
  esdb:connection   isAlive: true,
  esdb:connection   httpEndpoint: { address: '127.0.0.1', port: 2113 }
  esdb:connection } +1ms
  esdb:connection Connecting to http://127.0.0.1:2113 +0ms
  esdb:connection Createing client for readAll +1ms
  esdb:connection Using existing connection +1ms
  esdb:connection Using existing grpc client for readAll +0ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
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  esdb:connection Using existing grpc client for subscribeToStream +2ms
  esdb:connection Using existing grpc client for subscribeToStream +1ms
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  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToStream +3ms
  esdb:connection Using existing grpc client for subscribeToStream +0ms
  esdb:connection Using existing grpc client for subscribeToAll +61ms
  esdb:connection Using existing grpc client for subscribeToAll +1ms