Why Connection to electron service keeps dropping every 15-20mins

vuk.magdelinic · April 2021

I'm connecting using the Java API

zoya faberov · April 2021

I would differentiate two types of possible issues with the described scenario:

1. Code related:

If you run a standard example that came with SDK, with the same connection parameters as your custom application and it does not drop connection, then the issue is likely related to custom application code and needs to be investigated from the code perspective. One of the possible approach is divide and conquer - separate and remove pieces of custom code till you find a point when the connection drop does not occur, and that should allow to at least narrow down the possible causes and consequently come up with the solution.

2. Connectivity and infrastructure related:

If the standard example drops connection at the same or very close pattern, you are looking at the connectivity or infrastructure related issues. If you are connecting to Refinitiv Realtime Optimized or Refinitiv hosted, the first step is to check with Refinitiv Helpdesk Online -> Notifications and Alerts -> Service Alerts and if you don't find a relevant alert, open support ticket with Refinitiv Helpdesk Online to help you investigate the issue. If you are connecting to your local deployed infra, contact your market data/network admin/group to investigate the issue.

I hope this information helps to proceed toward the resolution of the connection issue

vuk.magdelinic · April 2021

Here's the error I get:

com.refinitiv.ema.access.OmmInvalidUsageExceptionImpl: RDMLogin stream was closed with status message

username XXXXXX

usernameType 1

State: Closed/Suspect/Internal error from sender - text: "Login Denied:Failed to validate sso token"

zoya faberov · April 2021

Hello @vuk.magdelinic,

In order for us to try to help further, please provide the complete details:

Versions: of RTSDK or Elektron SDK, EMA or ETA, language, OS?

Infra connectivity: is it Refinitiv Realtime Optimized in cloud, Refinitiv Realtime Hosted? a deployed infrustructure?

Is the issue reproducible with one of the standard examples that came with your SDK, or only in a custom app?

Is my understanding correct that you establish connectivity and subscription, you observe streaming data for 15-20 mins and only then your connection drops, and you observe this error message?

Any other relevant information or details.

Thanks

vuk.magdelinic · April 2021

We use Java EMAfactory to connect to ELECKTRON_DD service.

Pls point us to the standard examples as we couldn't find them.

We establish connection, it lasts for 15-20mins and then dies without any error. Sometimes when we try to reestablish connection, we get the error pasted earlier. Other times we get the following error:

java.lang.NullPointerException: null

at com.thomsonreuters.ema.access.SingleItem.rsslSubmit(ItemCallbackClient.java:3047) ~[MarketPriceChain_KPL.jar:?]

at com.thomsonreuters.ema.access.SingleItem.close(ItemCallbackClient.java:2902) ~[MarketPriceChain_KPL.jar:?]

at com.thomsonreuters.ema.access.ItemCallbackClient.unregister(ItemCallbackClient.java:2301) ~[MarketPriceChain_KPL.jar:?]

at com.thomsonreuters.ema.access.OmmBaseImpl.unregister(OmmBaseImpl.java:509) ~[MarketPriceChain_KPL.jar:?]

at com.thomsonreuters.ema.access.OmmConsumerImpl.unregister(OmmConsumerImpl.java:167) ~[MarketPriceChain_KPL.jar:?]

at com.thomsonreuters.platformservices.elektron.objects.marketprice.MarketPriceImpl.close(MarketPriceImpl.java:156) ~[MarketPriceChain_KPL.jar:?]

at MarketPriceASKBID.SwapRates.fetchSwapData(SwapRates.java:201)

vuk.magdelinic · April 2021

Are there any timeouts/timelimits before a connection expires and needs to be restarted?

Last day, we had uninterrupted service for 4hrs and then it dropped twice

vuk.magdelinic · April 2021

Sorry infastructure meaning?

zoya faberov · April 2021

Hello @vuk.magdelinic,

Please see my previous questions, to try to help you determine what is happening:

Versions: of RTSDK or Elektron SDK, EMA or ETA, language, OS?

Infra connectivity: is it Refinitiv Realtime Optimized in cloud, Refinitiv Realtime Hosted? a deployed infrastructure?

Is the issue reproducible with one of the standard examples that came with your SDK, or only in a custom app?

Is my understanding correct that you establish connectivity and subscription, you observe streaming data for 15-20 mins and only then your connection drops, and you observe this error message?

zoya faberov · April 2021

Hello @vuk.magdelinic,

I believe you are connecting to Refinitiv Real Time Optimized ( RRTO, also formerly Elektron Real in cloud).

I do not know what SDK you are working with, you appear to be using EMA Java.

In order to determine if the disconnects are related to connectivity interrupts, infra outages or are code-related, would like to suggest to run a simple standard EMA Java consumer that came with your SDK.

For instance, in RTSDK 2.0 examples folder:

...\Ema\Examples\src\main\java\com\refinitiv\ema\examples\training\consumer\series400\ex430_MP_Authentication

Example 430 = MarketPrice Authentication,

And see if it faces the same connection issues as your custom code.

Does this help, are you able to proceed?

vuk.magdelinic · April 2021

Hi I hope you have read my responses to your questions.

We are using EMA (ema-3.6.0.0.jar) in JAVA. On Unix

We are connecting to RSSL_Encrypted

Host: amer-3-t2.streaming-pricing-api.refinitiv.com Port 14002

Does this give you some clarity??

As explained multiple times, sometimes we see null pointer exception Error message, sometimes no error message

vuk.magdelinic · April 2021

Hi I hope you have read my responses to your questions.

We are using EMA (ema-3.6.0.0.jar) in JAVA. On Unix

We are connecting to RSSL_Encrypted

Host: amer-3-t2.streaming-pricing-api.refinitiv.com Port 14002

Does this give you some clarity??

As explained multiple times, sometimes we see null pointer exception Error message, sometimes no error message

vuk.magdelinic · April 2021

In the Java jar file that I'm using I dont see \Ema\Examples\src\main\java\com\refinitiv\ema\examples\training\consumer\series400\ex430_MP_Authentication

I see the following:

com.refinitiv.platformservices.elektron.objects.commoncom.refinitiv.platformservices.elektron.objects.datacom.refinitiv.platformservices.elektron.objects.marketplace

zoya faberov · April 2021

Hello @vuk.magdelinic,

Thank you for this confirmation. Appreciate your patience. You are on the latest RTSDK 2.x.

As you mention you run on Unix, please refer to the latest API Compatibility Matrix, tab Operating System. I do not believe any UNIX/Solaris are certified for RTSDK/EMA. This is very likely the root cause of the problem.

However, let me try to learn more. Both pre-built versions of RTSDK from Downloads and the complete source version available from GitHub RTSDK Repository includes complete set of our examples. Let's try to step back, do you see Examples folder that came with your version of RTSDK? This directory would not be part of the library itself, within EMA jar, this would be part of SDK, next to Docs and Libs?

Will you able to step back, and test with our starter example, I would suggest following EMA Quickstart - Connecting to RRTO for complete sequence of steps, on one of the certified platforms, to confirm if the issue persists?

chavalit-jintamalit · April 2021

Hi @vuk.magdelinic

Are you by any chance using the same Machine ID / password for multiple applications making multiple connections to RRTO ?

vuk.magdelinic · April 2021

@chavalit.jintamalit Error I'm getting is this: (are you saying this is because of multiple connections?)

java.lang.IllegalMonitorStateException

at java.util.concurrent.locks.ReentrantLock$Sync.tryRelease(ReentrantLock.java:151)

at java.util.concurrent.locks.AbstractQueuedSynchronizer.release(AbstractQueuedSynchronizer.java:1261)

at java.util.concurrent.locks.ReentrantLock.unlock(ReentrantLock.java:457)

at com.refinitiv.eta.transport.ReentrantLock.unlock(ReentrantLock.java:28)

at com.refinitiv.eta.transport.RsslHttpSocketChannel.read(RsslHttpSocketChannel.java:1031)

at com.refinitiv.eta.valueadd.reactor.Reactor.performChannelRead(Reactor.java:2816)

at com.refinitiv.eta.valueadd.reactor.Reactor.dispatchChannel(Reactor.java:2481)

at com.refinitiv.eta.valueadd.reactor.ReactorChannel.dispatch(ReactorChannel.java:574)

at com.refinitiv.ema.access.OmmBaseImpl.rsslReactorDispatchLoop(OmmBaseImpl.java:1487)

at com.refinitiv.ema.access.OmmBaseImpl.dispatch(OmmBaseImpl.java:598)

at com.refinitiv.ema.access.OmmConsumerImpl.dispatch(OmmConsumerImpl.java:185)

at com.refinitiv.platformservices.elektron.objects.common.DispatcherImpl.dispatchEventsUntilComplete(DispatcherImpl.java:49)

at com.refinitiv.platformservices.elektron.objects.marketprice.MarketPriceImpl.waitForCompletion(MarketPriceImpl.java:346)

at com.refinitiv.platformservices.elektron.objects.marketprice.MarketPriceImpl.open(MarketPriceImpl.java:146)

at MarketPriceASKBID.SwapRates.fetchSwapData(SwapRates.java:142)

chavalit-jintamalit · April 2021

Hi @vuk.magdelinic

I am looking at this error.

State: Closed/Suspect/Internal error from sender - text: "Login Denied:Failed to validate sso token"

Do you use the same Machine ID on more than one connection?

Or did you by any chance happen to login with the same machine ID before around the time you got this error?

Are you using the latest EMA API?

Do you enableSessionManagement on EMA API?

When you log in to get token, did you pass in takeExclusiveSignOnControl as True or False?

vuk.magdelinic · April 2021

@chavalit.jintamalit pls look at the below error instead: (because Login denied error was probably when we were trying to reconnect the session every 15-20mins automatically)

Java.lang.IllegalMonitorStateException