gauravtiwari89 commented on a change in pull request #8220:
[FLINK-12259][flink-clients]Improve debuggability of method invocatio…
URL: https://github.com/apache/flink/pull/8220#discussion_r276992911
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File path:
flink-clients/src/main/java/org/apache/flink/client/program/OptimizerPlanEnvironment.java
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@@ -74,9 +76,11 @@ public FlinkPlan getOptimizedPlan(PackagedProgram prog)
throws ProgramInvocation
PrintStream originalOut = System.out;
PrintStream originalErr = System.err;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
- System.setOut(new PrintStream(baos));
+ TeeOutputStream combinedStdOut = new
TeeOutputStream(originalOut, baos);
+ System.setOut(new PrintStream(combinedStdOut));
ByteArrayOutputStream baes = new ByteArrayOutputStream();
- System.setErr(new PrintStream(baes));
+ TeeOutputStream combinedStdErr = new
TeeOutputStream(originalErr, baes);
Review comment:
Do we need to close these streams? Additionally, its not clear to me why we
need to trap the output. It seems to only be used for the exception at line
109. Couldn't the client just refer to the logs instead?
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