FrankChen021 commented on a change in pull request #11723:
URL: https://github.com/apache/druid/pull/11723#discussion_r730412089
##########
File path:
indexing-service/src/main/java/org/apache/druid/indexing/overlord/sampler/SamplerExceptionMapper.java
##########
@@ -28,13 +29,21 @@
@Provider
public class SamplerExceptionMapper implements
ExceptionMapper<SamplerException>
{
+ private static final Logger LOG = new Logger(SamplerExceptionMapper.class);
+
@Override
public Response toResponse(SamplerException exception)
{
+ String message = exception.getMessage() == null ? "The sampler encountered
an issue" : exception.getMessage();
+
+ // stack trace is not returned to the client,
+ // so the cause of the exception should be logged so that we know where
the exception is thrown
+ LOG.error(exception.getCause(), message);
Review comment:
fixed.
##########
File path:
indexing-service/src/main/java/org/apache/druid/indexing/seekablestream/SeekableStreamSamplerSpec.java
##########
@@ -92,9 +93,22 @@ public SamplerResponse sample()
);
inputFormat = null;
} else {
+ RecordSupplier<PartitionIdType, SequenceOffsetType, RecordType>
recordSupplier;
+
+ try {
+ recordSupplier = createRecordSupplier();
+ }
+ catch (Exception e) {
+ if (e.getCause() != null) {
+ throw new SamplerException(e, "Unable to sample data: %s. Cause:
%s", e.getMessage(), e.getCause().getMessage());
Review comment:
fixed
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