showuon commented on code in PR #13102:
URL: https://github.com/apache/kafka/pull/13102#discussion_r1067632210
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raft/src/test/java/org/apache/kafka/raft/FileBasedStateStoreTest.java:
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@@ -90,6 +98,43 @@ public void testWriteElectionState() throws IOException {
assertFalse(stateFile.exists());
}
+ @Test
+ public void testCompatibilityWithClusterId() throws IOException {
+ final File stateFile = TestUtils.tempFile();
+ stateStore = new FileBasedStateStore(stateFile);
+
+ // We initialized a state from the metadata log
+ assertTrue(stateFile.exists());
+
+ String jsonString =
"{\"clusterId\":\"abc\",\"leaderId\":0,\"leaderEpoch\":0,\"votedId\":-1,\"appliedOffset\":0,\"currentVoters\":[],\"data_version\":0}";
+ writeToStateFile(stateFile, jsonString);
+
+ // verify that we can read the state file that contains the removed
"cluserId" field.
+ assertEquals(stateStore.readElectionState(), new ElectionState(0,
+ OptionalInt.of(0), OptionalInt.empty(),
Collections.emptySet()));
Review Comment:
1. we should put the expected result in the first parameter, so that the
failed output will be meaningful. (ref:
[here](https://junit.org/junit5/docs/5.0.1/api/org/junit/jupiter/api/Assertions.html#assertEquals-java.lang.Object-java.lang.Object-))
2. I saw we use `ElectionState.withElectedLeader`, instead of `new
ElectionState`. Do you think we can use the former one for consistency?
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