stream2000 commented on PR #8609:
URL: https://github.com/apache/hudi/pull/8609#issuecomment-1598054220
We found that multiple writer parallelly updates will cause both
hoodie.properties and its backup file to be deleted. We should not only deal
with read-write conflicts but also write-write conflicts.
We can reproduce the bug in the following code:
```java
final ExecutorService executor = Executors.newFixedThreadPool(3);
List<Future> fututes = new ArrayList<>();
Future updaterFuture1 = executor.submit(() -> {
HoodieTableMetaClient metaClient =
HoodieTableMetaClient.builder().setConf(BASE_CONF).setBasePath(PATH).build();
for (int i = 0; i < 100; i++) {
IncrementalTTLPolicyUtils.mergeTTLPolicies(metaClient);
}
});
fututes.add(updaterFuture1);
Future updaterFuture2 = executor.submit(() -> {
HoodieTableMetaClient metaClient =
HoodieTableMetaClient.builder().setConf(BASE_CONF).setBasePath(PATH).build();
for (int i = 0; i < 100; i++) {
IncrementalTTLPolicyUtils.mergeTTLPolicies(metaClient);
}
});
fututes.add(updaterFuture2);
// There will be exception throw out in the write future
for (Future f : fututes) {
f.get();
}
```
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