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Description
I have a discord bot that runs in the background for long periods of time that usually works great. Intermittently, I get a
WebSocketException in the logs (see log section). After that, the bot no longer appears online and doesn't receive messages. I have to shut everything down and restart the bot.
Version Information
- Clojure Version: 1.11.1
- Discljord Version: 1.3.1
- OS bot is hosted on: Linux
To Reproduce
I don't have a consistent approach to reproducing the exception, but I think there might still be enough info to attempt a fix.
Expected behavior
The bot should continue trying to reconnect.
Logs
Jul 25, 2023 12:33:26 AM discljord.connections.impl invoke
INFO: Exiting the shard loop
Exception in thread "async-dispatch-10" java.util.concurrent.ExecutionException: org.eclipse.jetty.websocket.api.WebSocketException: Session closed
at org.eclipse.jetty.util.FutureCallback.get(FutureCallback.java:123)
at org.eclipse.jetty.util.FutureCallback.get(FutureCallback.java:30)
at clojure.core$deref_future.invokeStatic(core.clj:2317)
at clojure.core$deref.invokeStatic(core.clj:2337)
at clojure.core$deref.invoke(core.clj:2323)
at gniazdo.core$eval32382$fn__32383.invoke(core.clj:21)
at gniazdo.core$eval32363$fn__32364$G__32354__32371.invoke(core.clj:17)
at gniazdo.core$connect_with_client$reify__32474.send_msg(core.clj:138)
at discljord.connections.impl$step_shard_BANG_$heartbeat_fn__33010.invoke(impl.clj:393)
at discljord.connections.impl$step_shard_BANG_$fn__33161$state_machine__16821__auto____33188$fn__33190.invoke(impl.clj:438)
at discljord.connections.impl$step_shard_BANG_$fn__33161$state_machine__16821__auto____33188.invoke(impl.clj:431)
at clojure.core.async.impl.runtime$run_state_machine.invokeStatic(runtime.clj:62)
at clojure.core.async.impl.runtime$run_state_machine.invoke(runtime.clj:61)
at clojure.core.async.impl.runtime$run_state_machine_wrapped.invokeStatic(runtime.clj:66)
at clojure.core.async.impl.runtime$run_state_machine_wrapped.invoke(runtime.clj:64)
at clojure.core.async$ioc_alts_BANG_$fn__11707.invoke(async.clj:423)
at clojure.core.async$do_alts$fn__11638$fn__11641.invoke(async.clj:290)
at clojure.core.async.impl.channels.ManyToManyChannel$fn__11351$fn__11352.invoke(channels.clj:100)
at clojure.lang.AFn.run(AFn.java:22)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at clojure.core.async.impl.concurrent$counted_thread_factory$reify__11220$fn__11221.invoke(concurrent.clj:29)
at clojure.lang.AFn.run(AFn.java:22)
at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: org.eclipse.jetty.websocket.api.WebSocketException: Session closed
at org.eclipse.jetty.websocket.common.WebSocketSession.outgoingFrame(WebSocketSession.java:350)
at org.eclipse.jetty.websocket.common.WebSocketRemoteEndpoint.uncheckedSendFrame(WebSocketRemoteEndpoint.java:322)
at org.eclipse.jetty.websocket.common.WebSocketRemoteEndpoint.sendAsyncFrame(WebSocketRemoteEndpoint.java:243)
at org.eclipse.jetty.websocket.common.WebSocketRemoteEndpoint.sendStringByFuture(WebSocketRemoteEndpoint.java:419)
at gniazdo.core$eval32382$fn__32383.invoke(core.clj:24)
... 18 more
Additional context
- I'm running the bot on a dinky server
- The server is usually not doing much, but sometimes has a lot of work to do that might bog down the CPU and/or cause memory pressure on the JVM