Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/7839#discussion_r36106227
--- Diff:
network/yarn/src/main/java/org/apache/spark/network/yarn/YarnShuffleService.java
---
@@ -181,4 +246,28 @@ public ByteBuffer getMetaData() {
return ByteBuffer.allocate(0);
}
+ private void reloadRegisteredExecutors() throws IOException,
ClassNotFoundException {
+ if (registeredExecutorFile != null && registeredExecutorFile.exists())
{
+ ObjectInputStream in = new ObjectInputStream(new
FileInputStream(registeredExecutorFile));
+ int nExecutors = in.readInt();
+ logger.info("Reloading executors from {}", registeredExecutorFile);
+ for (int i = 0; i < nExecutors; i++) {
+ AppExecId appExecId = (AppExecId) in.readObject();
+ ExecutorShuffleInfo shuffleInfo = (ExecutorShuffleInfo)
in.readObject();
+ logger.info("Recovered executor {} with {}", appExecId,
shuffleInfo);
+ List<Map.Entry<AppExecId, ExecutorShuffleInfo>> executorsForApp =
+ recoveredExecutorRegistrations.get(appExecId.appId);
+ if (executorsForApp == null) {
+ executorsForApp = new ArrayList<>();
+ recoveredExecutorRegistrations.put(appExecId.appId,
executorsForApp);
+ }
+ executorsForApp.add(new
AbstractMap.SimpleImmutableEntry<>(appExecId, shuffleInfo));
+ }
+ in.close();
+ } else {
+ logger.info("No executor info to reload");
+ }
+ }
+
--- End diff --
nit: too many empty lines.
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