Cheol-Soon-Choi opened a new issue, #258:
URL: https://github.com/apache/apisix-java-plugin-runner/issues/258
### Issue description
At some point during apisix operation, an error suddenly occurs and the
client call does not proceed at all.
For all client calls, can check the error log as below.
```
phase_func(): failed to receive RPC_HTTP_REQ_CALL: timeout
```
```
run_plugin(): ext-plugin-pre-req exits with http status code 503
```
```
ERROR 57658 --- [tLoopGroup-34-6] o.a.a.p.r.h.ExceptionCaughtHandler :
handle request error:
io.netty.channel.StacklessClosedChannelException: null
at io.netty.channel.AbstractChannel$AbstractUnsafe.write(Object,
ChannelPromise)(Unknown Source)
~[netty-transport-4.1.78.Final.jar!/:4.1.78.Final]
Caused by: io.netty.channel.unix.Errors$NativeIoException: writeAddress(..)
failed: Broken pipe
```
It was confirmed that the client call resumed normally after 20 to 30
minutes without taking any action.
I'd like to know under what circumstances this problem occurs and prevent it
from recurring.
Is it a linux or apisix or java runner resource issue?
I wish I could give you some advice on this matter. Thanks in advance.
### Environment
linux RAM 8G / java runner cmd option is `'-Xmx2g', '-Xms2g'` / RPS is about
200~600(tends to happen when rps are high, but doesn't always happen)
* your apisix-java-plugin-runner version 0.4.0
apisix 3.2.1
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