adutra opened a new pull request, #800:
URL: https://github.com/apache/polaris/pull/800
This was due to the fact that each token fetch created a new client, and the
client wasn't closed.
The typical stack trace is:
```
failed to open a new selector
io.netty.channel.ChannelException: failed to open a new selector
at
app//io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:179)
...
at
app//org.apache.polaris.service.it.ext.PolarisServerManager.createClient(PolarisServerManager.java:64)
at
app//org.apache.polaris.service.it.ext.PolarisServerManager.accessManager(PolarisServerManager.java:55)
at
app//org.apache.polaris.service.it.env.PolarisClient.obtainToken(PolarisClient.java:118)
at
app//org.apache.polaris.service.it.env.PolarisClient.managementApi(PolarisClient.java:88)
at
app//org.apache.polaris.service.it.env.PolarisClient.cleanUp(PolarisClient.java:126)
...
Caused by: java.io.IOException: Too many open files
at java.base/sun.nio.ch.KQueue.create(Native Method)
at
java.base/sun.nio.ch.KQueueSelectorImpl.<init>(KQueueSelectorImpl.java:83)
at
java.base/sun.nio.ch.KQueueSelectorProvider.openSelector(KQueueSelectorProvider.java:36)
at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:177)
... 32 more
```
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