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Provide a better error message for the case when all shards failed (#28333) 

Today we don't specify a cause which can make debugging very very tricky.
This change is best effort to supply at least one cause for the failure.
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Simon Willnauer 2018-01-23 14:50:02 +01:00 committed by GitHub
parent ba9e2e44cb
commit d31e964a86
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1 changed files with 4 additions and 4 deletions
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8
server/src/main/java/org/elasticsearch/action/search/AbstractSearchAsyncAction.java
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@ -122,14 +122,14 @@ abstract class AbstractSearchAsyncAction<Result extends SearchPhaseResult> exten
* at least one successful operation left and if so we move to the next phase. If not we immediately fail the
* search phase as "all shards failed"*/
if (successfulOps.get() == 0) { // we have 0 successful results that means we shortcut stuff and return a failure
final ShardOperationFailedException[] shardSearchFailures = ExceptionsHelper.groupBy(buildShardFailures());
Throwable cause = shardSearchFailures.length == 0 ? null :
ElasticsearchException.guessRootCauses(shardSearchFailures[0].getCause())[0];
if (logger.isDebugEnabled()) {
final ShardOperationFailedException[] shardSearchFailures = ExceptionsHelper.groupBy(buildShardFailures());
Throwable cause = shardSearchFailures.length == 0 ? null :
ElasticsearchException.guessRootCauses(shardSearchFailures[0].getCause())[0];
logger.debug((Supplier<?>) () -> new ParameterizedMessage("All shards failed for phase: [{}]", getName()),
cause);
}
onPhaseFailure(currentPhase, "all shards failed", null);
onPhaseFailure(currentPhase, "all shards failed", cause);
} else {
if (logger.isTraceEnabled()) {
final String resultsFrom = results.getSuccessfulResults()