GitHub user bowenli86 opened a pull request:
https://github.com/apache/flink/pull/4508
[FLINK-7405][metrics] Reduce excessive warning logging from
DatadogHttpReporter
## What is the purpose of the change
DatadogHttpReporter is logging too much when there's a connection timeout,
and we need to reduce the amount of logging noise.
The excessive logging looks like:
```
2017-08-07 19:30:54,408 WARN
org.apache.flink.metrics.datadog.DatadogHttpReporter - Failed
reporting metrics to Datadog.
java.net.SocketTimeoutException: timeout
at
org.apache.flink.shaded.okio.Okio$4.newTimeoutException(Okio.java:227)
at org.apache.flink.shaded.okio.AsyncTimeout.exit(AsyncTimeout.java:284)
at
org.apache.flink.shaded.okio.AsyncTimeout$2.read(AsyncTimeout.java:240)
at
org.apache.flink.shaded.okio.RealBufferedSource.indexOf(RealBufferedSource.java:344)
at
org.apache.flink.shaded.okio.RealBufferedSource.readUtf8LineStrict(RealBufferedSource.java:216)
at
org.apache.flink.shaded.okio.RealBufferedSource.readUtf8LineStrict(RealBufferedSource.java:210)
at
org.apache.flink.shaded.okhttp3.internal.http1.Http1Codec.readResponseHeaders(Http1Codec.java:189)
at
org.apache.flink.shaded.okhttp3.internal.http.CallServerInterceptor.intercept(CallServerInterceptor.java:75)
at
org.apache.flink.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at
org.apache.flink.shaded.okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:45)
at
org.apache.flink.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at
org.apache.flink.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
at
org.apache.flink.shaded.okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93)
at
org.apache.flink.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at
org.apache.flink.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
at
org.apache.flink.shaded.okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
at
org.apache.flink.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at
org.apache.flink.shaded.okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:120)
at
org.apache.flink.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
at
org.apache.flink.shaded.okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
at
org.apache.flink.shaded.okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:185)
at org.apache.flink.shaded.okhttp3.RealCall.execute(RealCall.java:69)
at
org.apache.flink.metrics.datadog.DatadogHttpClient.send(DatadogHttpClient.java:85)
at
org.apache.flink.metrics.datadog.DatadogHttpReporter.report(DatadogHttpReporter.java:142)
at
org.apache.flink.runtime.metrics.MetricRegistry$ReporterTask.run(MetricRegistry.java:381)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.net.SocketException: Socket closed
at java.net.SocketInputStream.read(SocketInputStream.java:204)
at java.net.SocketInputStream.read(SocketInputStream.java:141)
at sun.security.ssl.InputRecord.readFully(InputRecord.java:465)
at sun.security.ssl.InputRecord.read(InputRecord.java:503)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:983)
at sun.security.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:940)
at sun.security.ssl.AppInputStream.read(AppInputStream.java:105)
at org.apache.flink.shaded.okio.Okio$2.read(Okio.java:138)
at
org.apache.flink.shaded.okio.AsyncTimeout$2.read(AsyncTimeout.java:236)
... 29 more
```
The logging doesn't matter since DatadogHttpReporter won't retry when it
fails sending out requests. Thus, let's reduce it to something as concise as
this:
```
2017-08-07 19:30:54,408 WARN
org.apache.flink.metrics.datadog.DatadogHttpReporter - Failed
reporting metrics to Datadog.
java.net.SocketTimeoutException: timeout
```
## Brief change log
Only log exception message rather than the whole stack trace
## Verifying this change
This change is a trivial rework / code cleanup without any test coverage.
## Does this pull request potentially affect one of the following parts:
## Documentation
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/bowenli86/flink FLINK-7405
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/4508.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #4508
----
commit 1e9a1e8ea65a56d05c486e4d690bc6f1410b9a58
Author: Bowen Li <[email protected]>
Date: 2017-08-09T21:11:16Z
FLINK-7405 Reduce excessive warning logging from DatadogHttpReporter
----
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