UPA NIProvider application throws java exception

Hi all,

My name is Sarun from ET 3rd level support. ET product is able to consume MarketByVolume rate from OMM feed. Therefore, ET bank normally writes their own application to feed MarketByVolume rate to ET.

This also applies to the client, the ET bank that implement their feed application based on NIProvider. The Bank (SB) usually mentions that when the application runs for a while, there is an error thrown from UPA.

Therefore, I need a consult from the community for a possible cause. Here is an error shown in the application log.

2019-09-10 09:11:09,049 ERROR [com.sb.ec.upa.runtime.UpaCtxImpl] - Error in call context UpaCtx [error=null]: com.sb.ec.upa.UpaException
2019-09-10 09:11:09,049 ERROR [com.sb.ec.upa.common.UpaChannelSession] - Error encoding message: com.sb.ec.upa.udm.marketbyvolume.VectorPriceUpdateMsg@c75e488 <{}>
2019-09-10 09:11:09,049 ERROR [com.sb.ec.util.concurrent.ConflatingFunnel] - Failed to consume item
com.sb.ec.upa.UpaException: null
    at com.sb.ec.upa.runtime.UpaCtxImpl.throwException(UpaCtxImpl.java:90) ~[SB-upa-2.26.0.jar:?]
    at com.sb.ec.upa.common.UpaChannelSession.write(UpaChannelSession.java:650) ~[SB-upa-2.26.0.jar:?]
    at com.sb.ec.upa.common.UpaChannelSession.send(UpaChannelSession.java:549) ~[SB-upa-2.26.0.jar:?]
    at com.sb.ec.upa.niprovider.NIProvider.lambda$null$4(NIProvider.java:242) ~[SB-upa-2.26.0.jar:?]
    at com.sb.ec.upa.ext.PriceProvider.lambda$null$8(PriceProvider.java:42) ~[SB-upa-2.26.0.jar:?]
    at java.util.Optional.ifPresent(Optional.java:159) ~[?:1.8.0_74]
    at com.sb.ec.upa.ext.PriceProvider.lambda$subscribe$9(PriceProvider.java:37) ~[SB-upa-2.26.0.jar:?]
    at com.sb.ec.pricing.retladderedpublisher.service.Subscription.push(Subscription.java:35) ~[Pricing-RetLadderedPublisher-2.26.0.jar:?]
    at com.sb.ec.pricing.retladderedpublisher.service.SpotFxPriceLadderSource.lambda$start$1(SpotFxPriceLadderSource.java:45) ~[Pricing-RetLadderedPublisher-2.26.0.jar:?]
    at com.sb.ec.util.concurrent.ConflatingFunnel.notifyListener(ConflatingFunnel.java:143) ~[Pricing-Common-5.5.0.jar:?]
    at com.sb.ec.util.concurrent.ConflatingFunnel.consumeWaitingItem(ConflatingFunnel.java:135) ~[Pricing-Common-5.5.0.jar:?]
    at com.sb.ec.util.concurrent.ConflatingFunnel.consumeWaitingItem(ConflatingFunnel.java:126) ~[Pricing-Common-5.5.0.jar:?]
    at com.sb.ec.util.concurrent.ConflatingFunnel.consumeWaitingItems(ConflatingFunnel.java:112) ~[Pricing-Common-5.5.0.jar:?]
    at com.sb.ec.util.concurrent.ConflatingFunnel.access$000(ConflatingFunnel.java:18) ~[Pricing-Common-5.5.0.jar:?]
    at com.sb.ec.util.concurrent.ConflatingFunnel$1.run(ConflatingFunnel.java:98) ~[Pricing-Common-5.5.0.jar:?]
    at java.lang.Thread.run(Thread.java:745) [?:1.8.0_74]