GetEventstore JVM Client

EventStoreDB
1

I have this kind of message when i try to write several event in get eventstore (3.0.3) witj JVM Client (2.0.2)

2016-08-18T16:42:51.974+02:00 2016-08-18 16:42:26,036 ERROR application -
2016-08-18T16:42:51.975+02:00 akka.pattern.AskTimeoutException: Ask timed out on [Actor[akka://perfimmo-eventstore/user/$a#-597954850]] after [2000 ms]
2016-08-18T16:42:51.975+02:00 at akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:334) ~[com.typesafe.akka.akka-actor_2.11-2.3.13.jar:na]
2016-08-18T16:42:51.975+02:00 at akka.actor.Scheduler$$anon$7.run(Scheduler.scala:117) ~[com.typesafe.akka.akka-actor_2.11-2.3.13.jar:na]
2016-08-18T16:42:51.976+02:00 at scala.concurrent.Future$InternalCallbackExecutor$.unbatchedExecute(Future.scala:599) ~[org.scala-lang.scala-library-2.11.7.jar:na]
2016-08-18T16:42:51.976+02:00 at scala.concurrent.BatchingExecutor$class.execute(BatchingExecutor.scala:109) ~[org.scala-lang.scala-library-2.11.7.jar:na]
2016-08-18T16:42:51.976+02:00 at scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:597) ~[org.scala-lang.scala-library-2.11.7.jar:na]
2016-08-18T16:42:51.977+02:00 at akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(Scheduler.scala:467) ~[com.typesafe.akka.akka-actor_2.11-2.3.13.jar:na]
2016-08-18T16:42:51.977+02:00 at akka.actor.LightArrayRevolverScheduler$$anon$8.executeBucket$1(Scheduler.scala:419) ~[com.typesafe.akka.akka-actor_2.11-2.3.13.jar:na]
2016-08-18T16:42:51.978+02:00 at akka.actor.LightArrayRevolverScheduler$$anon$8.nextTick(Scheduler.scala:423) ~[com.typesafe.akka.akka-actor_2.11-2.3.13.jar:na]
2016-08-18T16:42:51.978+02:00 at akka.actor.LightArrayRevolverScheduler$$anon$8.run(Scheduler.scala:375) ~[com.typesafe.akka.akka-actor_2.11-2.3.13.jar:na]
2016-08-18T16:42:51.978+02:00 at java.lang.Thread.run(Thread.java:745) ~[na:1.8.0_101]

Any idea on what happened ?

The number of event is ~200 /sec not very strong throughput.

The result of that seems an explosion of my JVM memory and the crash of my app.

2

It seems the issue come from my ubuntu server where geteventsotre is deploy because of the number of file descriptors on Ubuntu by default.
The eventstore can’t handle too many connection & the driver (i don’t know why) can’t handle this blocking and generate memory leak.

Anybody have advice for me ?

3

This should be posted as an issue on the jvm client.

In general in ubuntu you can change the number of allowed file
descriptors using ulimit (amongst other ways)

4

Ok. I post message on github issue traker for JVM client

5

Yaroslav tends to watch issues more than the list. Likely he will have
some comment on it.