FrankChen021 commented on a change in pull request #10955:
URL: https://github.com/apache/druid/pull/10955#discussion_r592002939
##########
File path:
integration-tests/src/main/java/org/apache/druid/testing/utils/DruidClusterAdminClient.java
##########
@@ -185,7 +187,23 @@ private void waitUntilInstanceReady(final String host)
return response.getStatus().equals(HttpResponseStatus.OK);
}
catch (Throwable e) {
- LOG.error(e, "");
+ //
+ // supress logging for some specific exceptions to reduce
excessive stack trace messages when waiting druid nodes to start up
+ //
+ if (e.getCause() instanceof ChannelException) {
+ Throwable channelException = e.getCause();
+
+ if (channelException.getCause() instanceof
ClosedChannelException) {
+ LOG.error("Channel Closed");
+ } else if (!"Channel
disconnected".equals(channelException.getMessage())) {
+ // for 'Channel Disconnected', there's no need to log the
error message
+ // because the underlying http client has already log this
kind of message
+ LOG.error(e, "");
+ }
Review comment:
In this case, `e.getMessages` returns "Channel disconnected", so the
```
LOG.error("Channel disconnected: " + e.getMessage());
```
outputs a text as 'Channel disconnected: Channel disconnected'.
I would change this line to ```LOG.error(e.getMessage());```
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