Github user StephanEwen commented on a diff in the pull request: https://github.com/apache/flink/pull/674#discussion_r30787324 --- Diff: flink-staging/flink-streaming/flink-streaming-connectors/src/main/java/org/apache/flink/streaming/connectors/kafka/api/persistent/PersistentKafkaSource.java --- @@ -225,7 +226,16 @@ public void close() { @Override public void restoreState(long[] state) { - // we maintain the offsets in Kafka, so nothing to do. + if(lastOffsets == null) { + LOG.warn("Restore state called before open() has been called"); + return; + } + LOG.info("Restoring state to {}", Arrays.toString(state)); + if(lastOffsets.length != state.length) { --- End diff -- How about sanity checking before logging that things are going to happen? Usually gives better logging insights...
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