littleorca commented on issue #11282:
URL: https://github.com/apache/pulsar/issues/11282#issuecomment-897304788
> @littleorca I am a litter confused for the NPE in
`cursor.readOperationCompleted()`, would you please provide the stack of the
NPE?
Try this test case:
```java
@Test
public void readEntryNPE() throws Exception {
MetadataStore metadataStore = new ZKMetadataStore(ZK_CONNECTION,
MetadataStoreConfig.builder().build());
ClientConfiguration bkClientConf = new ClientConfiguration();
bkClientConf.setMetadataServiceUri(METADATA_SERVICE_URI);
ManagedLedgerFactoryImpl factory = new
ManagedLedgerFactoryImpl(metadataStore, bkClientConf);
ManagedLedger ml = factory.open(ML_NAME);
ManagedCursor c = ml.openCursor(CURSOR_NAME);
Position pos = ml.addEntry("Hello
world!".getBytes(StandardCharsets.UTF_8));
c.close();
ml.close();
factory.shutdown();
factory = new ManagedLedgerFactoryImpl(metadataStore, bkClientConf);
ml = factory.open(ML_NAME);
c = ml.openCursor(CURSOR_NAME);
c.markDelete(pos);
ml.terminate();
ml.close();
factory.shutdown();
factory = new ManagedLedgerFactoryImpl(metadataStore, bkClientConf);
ml = factory.open(ML_NAME);
c = ml.openCursor(CURSOR_NAME);
c.seek(pos);
c.readEntries(1);
}
```
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