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fix(clouddriver): Return a call stack for better error handling #5584

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fix(clouddriver): Return a call stack for better error handling #5584

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fix(clouddriver): Return a call stack for better error handling
wattdave Nov 29, 2021
94f7685
Merge branch 'master' into patch-1
mergify[bot] Dec 2, 2021
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4 changes: 3 additions & 1 deletion ...in/groovy/com/netflix/spinnaker/clouddriver/aws/provider/agent/ClusterCachingAgent.groovy
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Original file line number Diff line number Diff line change
Expand Up @@ -550,7 +550,9 @@ class ClusterCachingAgent implements CachingAgent, OnDemandAgent, AccountAware,
cacheTargetGroups(data, targetGroups)
cacheLaunchTemplate(data, launchTemplates)
} catch (Exception ex) {
log.warn("Failed to cache ${asg.autoScalingGroupName} in ${account.name}/${region}", ex)
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I'm surprised this log statement doesn't print a stack trace already.

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Was going to comment the same but figured I must be missing something obvious.

Wonder if it's something like this? https://stackoverflow.com/a/9387598

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@wattdave wattdave Dec 2, 2021 •
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Here's the log it provides, unfortunately: message: Failed to cache fuzzed-metric-name-Metrics fuzzed_asg in fuzzed-location/us-west-2 stack_trace: java.lang.NullPointerException: null (copied from our Splunk.)

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For what it's worth, we find lots of other useful stack traces in other locations in the logs. Not sure why this one is special, but it very much is.

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Wonder if the fact that this is groovy is causing grief here?

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Erm, well - I would have to deploy it onto our local Spinnaker servers to be able to answer that, and I don't have access to do that.

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I presume we're on a later slf4j than 1.6.0? This link smells like what we're seeing: https://stackoverflow.com/questions/5951209/how-to-log-exception-and-message-with-placeholders-with-slf4j

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Let me put together a quick sample app to tinker with this...

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FYI:
spinnaker/spinnaker#5473
i think is also relevant ;) I'm watching this & other thread ;) Was rather confused to why stack traces aren't working myself.

StringWriter sw = new StringWriter()
ex.printStackTrace(sw)
log.warn("Failed to cache ${asg.autoScalingGroupName} in ${account.name}/${region}: ${sw.toString()}", ex)
}
}
}
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