ihuzenko commented on a change in pull request #1975: DRILL-7576: Fail fast for
operator errors
URL: https://github.com/apache/drill/pull/1975#discussion_r376919500
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/ScreenCreator.java
##########
@@ -83,47 +83,47 @@ public boolean innerNext() {
IterOutcome outcome = next(incoming);
logger.trace("Screen Outcome {}", outcome);
switch (outcome) {
- case STOP:
- return false;
- case NONE:
- if (firstBatch) {
- // this is the only data message sent to the client and may contain
the schema
- QueryWritableBatch batch;
- QueryData header = QueryData.newBuilder()
- .setQueryId(context.getHandle().getQueryId())
- .setRowCount(0)
- .setDef(RecordBatchDef.getDefaultInstance())
- .build();
- batch = new QueryWritableBatch(header);
+ case STOP:
+ return false;
+ case NONE:
+ if (firstBatch) {
+ // this is the only data message sent to the client and may
contain the schema
+ QueryWritableBatch batch;
+ QueryData header = QueryData.newBuilder()
+ .setQueryId(context.getHandle().getQueryId())
+ .setRowCount(0)
+ .setDef(RecordBatchDef.getDefaultInstance())
+ .build();
+ batch = new QueryWritableBatch(header);
+
+ stats.startWait();
+ try {
+ userConnection.sendData(batch);
+ } finally {
+ stats.stopWait();
+ }
+ firstBatch = false; // we don't really need to set this. But who
knows!
+ }
+ return false;
+ case OK_NEW_SCHEMA:
+ materializer = new VectorRecordMaterializer(context, oContext,
incoming);
+ //$FALL-THROUGH$
+ case OK:
+ injector.injectPause(context.getExecutionControls(), "sending-data",
logger);
+ final QueryWritableBatch batch = materializer.convertNext();
+ updateStats(batch);
stats.startWait();
try {
userConnection.sendData(batch);
} finally {
stats.stopWait();
}
- firstBatch = false; // we don't really need to set this. But who
knows!
- }
-
- return false;
- case OK_NEW_SCHEMA:
- materializer = new VectorRecordMaterializer(context, oContext,
incoming);
- //$FALL-THROUGH$
- case OK:
- injector.injectPause(context.getExecutionControls(), "sending-data",
logger);
- final QueryWritableBatch batch = materializer.convertNext();
- updateStats(batch);
- stats.startWait();
- try {
- userConnection.sendData(batch);
- } finally {
- stats.stopWait();
- }
- firstBatch = false;
-
- return true;
- default:
- throw new UnsupportedOperationException();
+ firstBatch = false;
+
+ return true;
+ default:
+ throw new UnsupportedOperationException();
Review comment:
Here would be nice to add message containing ```outcome``` which caused the
exception.
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