Failed to allocate RsslTunnelBuffer with EMA C++ post message
When the app submitted a bunch of page message (25*80) in a very short time, i started to get the exceptions below saying there's memory exhaustion.
OmmException Internal Error. Failed to allocate RsslTunnelStreamBuffer in TunnelItem::submitSubItemMsg( RsslMsg* )., Type=OmmMemoryExhaustionException
I am trying to send out about 150 pages (25*80) at that time. If I remove those RICs from the posting list and restart the app, everything works okay.
is this memory exhaustion caused by the number of messages it sent out? Is there a limit on the message size and rate?
Best Answer
-
It looks similar to the discussion in this thread.
For a tunnel stream, you may need to increase guaranteedOutputBuffers of TunnelStreamRequest.
TunnelStreamRequest tsr;
tsr.classOfService(cos).domainType(MMT_SYSTEM).name("Seikan").serviceName("DDS_TRCE");
tsr.guaranteedOutputBuffers(5000);0
Answers
-
@jirapongse.phuriphanvichai - thanks for your reply
We can attempt to increase this limit in our application. Is 5000 the recommended number of output buffers? Also, the error seemed to persist even when our outbound traffic was greatly reduced. If this error occurs are the buffers never released? Thanks0 -
Hi @ye.li
The error you are seeing is most likely due to exhausting tunnel buffers.
Whilst increasing the tunnel buffers can help, if the messages are not being acknowledged quickly enough, it will eventually have a build of pending messages e.g. delays because of the network or buffers not being cleared fast enough by RCC server.
If the absolute timeliness of the posts is not critical, then you could pace/throttle the rate at which you are sending the posts - i.e. just spread the posts over a slightly longer time period. This should avoid the exhausting of the tunnel buffers.
Otherwise, the other option would be to pause the posting momentarily when you run out of buffers.
There are no hard and fast rules/numbers as too many factors would affect what would be a serviceable rate of posting, you will need to experiment to find a safe rate - and then allow a safety margin.
0 -
No, 5000 is not the recommended number of guaranteed output buffers. It proves that the problem relates to the size of the guaranteed output buffers. Typically, the guaranteed output buffer is quite small for the consumer application because the guaranteed output buffer is for outgoing messages and the consumer application doesn't publish data.
However, the contribution application may require more guaranteed output buffers than the consumer application. The tsr.guaranteedOutputBuffers() method can be used to increase the size of guaranteed output buffers of a tunnel stream.
0
Categories
- All Categories
- 6 AHS
- 38 Alpha
- 161 App Studio
- 4 Block Chain
- 4 Bot Platform
- 16 Connected Risk APIs
- 47 Data Fusion
- 30 Data Model Discovery
- 608 Datastream
- 1.3K DSS
- 577 Eikon COM
- 4.9K Eikon Data APIs
- 7 Electronic Trading
- Generic FIX
- 7 Local Bank Node API
- Trading API
- 2.7K Elektron
- 1.3K EMA
- 236 ETA
- 519 WebSocket API
- 33 FX Venues
- 10 FX Market Data
- 1 FX Post Trade
- 1 FX Trading - Matching
- 12 FX Trading – RFQ Maker
- 5 Intelligent Tagging
- 2 Legal One
- 20 Messenger Bot
- 2 Messenger Side by Side
- 9 ONESOURCE
- 7 Indirect Tax
- 59 Open Calais
- 264 Open PermID
- 39 Entity Search
- 2 Org ID
- PAM
- PAM - Logging
- 8.4K Private Comments
- 6 Product Insight
- Project Tracking
- ProView
- ProView Internal
- 20 RDMS
- 1.4K Refinitiv Data Platform
- 367 Refinitiv Data Platform Libraries
- 3 Refinitiv Due Diligence
- LSEG Due Diligence Portal API
- 3 Refinitiv Due Dilligence Centre
- Rose's Space
- 1.1K Screening
- 18 Qual-ID API
- 13 Screening Deployed
- 23 Screening Online
- 10 World-Check Customer Risk Screener
- 990 World-Check One
- 44 World-Check One Zero Footprint
- 45 Side by Side Integration API
- Test Space
- 3 Thomson One Smart
- 1.2K TR Internal
- Global Hackathon 2015
- 2 Specialists Who Code
- 10 TR Knowledge Graph
- 150 Transactions
- 142 REDI API
- 1.7K TREP APIs
- 4 CAT
- 21 DACS Station
- 117 Open DACS
- 1.1K RFA
- 103 UPA
- 172 TREP Infrastructure
- 224 TRKD
- 886 TRTH
- 5 Velocity Analytics
- 5 Wealth Management Web Services
- 59 Workspace SDK
- 9 Element Framework
- 5 Grid
- 13 World-Check Data File
- Yield Book Analytics
- 46 中文论坛