If I understand clearly, postgresql is used as a Data server for the backend, and so the Android app does not connect directly to postgresql. The first idea is a problem on closing or recycling the connection by the backend after executing the request. Maybe wrong client connection pooling settings?
Il ven 4 ott 2024, 06:29 KK CHN <kkchn...@gmail.com> ha scritto: > List, > > I am facing a network (TCP IP connection closing issue) . > > Running a mobile tablet application, Android application to update the > status of vehicles fleet say around 1000 numbers installed with the app on > each vehicle along with a vehicle tracking application server solution > based on Java and Wildfly with PosrgreSQL16 backend. > > The mobile tablets are installed with the android based vehicle > tracking app which updated every 30 seconds its location fitted inside the > vehicle ( lat long coordinates) to the PostgreSQL DB through the java > backend application to know the latest location of the vehicle and its > movement which will be rendered in a map based front end. > > The vehicles on the field communicate via 443 to 8080 of the Wildfly > (version 27 ) deployed with the vehicle tracking application developed with > Java(version 17). > > > * The mobile tablet communicates to the backend application over mobile > data (4G/5G SIMS). * > > The running vehicles may disconnect or be unable to send the location > data in between if the mobile data coverage is less or absent in a > particular area where data coverage is nil or signal strength less. > > The server on which the backend application runs most often ( a week's > time or so) shows connection timeout and is unable to serve tracking of > the vehicles further. > > When we restart the Wildfly server the application returns to normal. > again the issue repeats after a week or two. > > In the Server machine when this bottleneck occurs I am seeing a lot of > TCP/IP CLOSE_WAIT ( 3000 to 5000 ) when the server backend becomes > unresponsive. > > What is the root cause of this issue ? Is it due to the android > application unable to send the CLOSE_WAIT ACK due to poor mobile data > connectivity ? > > > If so, how do people address this issue ? and what may be a fix ? > > Any directions / or reference material most welcome. > > Thank you, > Krishane > > > > > >
