TheNeuralBit commented on a change in pull request #13410:
URL: https://github.com/apache/beam/pull/13410#discussion_r553692685



##########
File path: 
runners/google-cloud-dataflow-java/worker/src/main/java/org/apache/beam/runners/dataflow/worker/logging/JulHandlerPrintStreamAdapterFactory.java
##########
@@ -86,7 +86,7 @@ public void write(int i) throws IOException {
       this.logger = Logger.getLogger(loggerName);
       this.buffer = new StringBuilder();
       this.decoder =
-          Charset.defaultCharset()
+          StandardCharsets.UTF_8

Review comment:
       What I was suggesting is that we should add a new argument to the 
private constructor and the static create() method: `Charset charset`. Then in 
the constructor we'll use `charset` instead of `Charset.defaultCharset()` to 
create `encoder`.
   
   Currently the test is using `StandardCharsets.UTF_8`, but only to create the 
expected outputs. It also needs to create a 
`JulHandlerPrintStreamAdapterFactory` that uses `UTF_8` explicitly, so we need 
a way to pass that through. I think as it is this test could still fail if the 
default charset isn't UTF-8




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