Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/3972#discussion_r118026253
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/ZooKeeperCompletedCheckpointStore.java
---
@@ -376,8 +377,14 @@ private static CompletedCheckpoint
retrieveCompletedCheckpoint(Tuple2<Retrievabl
try {
return stateHandlePath.f0.retrieveState();
- } catch (Exception e) {
- throw new FlinkException("Could not retrieve checkpoint
" + checkpointId + ". The state handle seems to be broken.", e);
+ } catch (ClassNotFoundException cnfe) {
+ throw new FlinkException("Could not retrieve checkpoint
" + checkpointId + " from state handle under " +
+ stateHandlePath.f1 + ". This indicates that you
are trying to recover from state written by an " +
+ "older Flink version which is not compatible.
Try cleaning the state handle store.", cnfe);
+ } catch (IOException ioe) {
+ throw new FlinkException("Could not retrieve " +
checkpointId + " worker from state handle under " +
--- End diff --
shouldn't this say `Could not retrieve checkpoint " + checkpointId + " from
state handle under` like in case of an CNFE?
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