lamber-ken edited a comment on pull request #1730:
URL: https://github.com/apache/ozone/pull/1730#issuecomment-754369202
hi @adoroszlai may only use `writeLock` is ok, like
```java
@Override
public void exportContainerData(OutputStream destination,
ContainerPacker<KeyValueContainerData> packer) throws IOException {
try {
writeLock();
// Closed/ Quasi closed containers are considered for replication by
// replication manager if they are under-replicated.
ContainerProtos.ContainerDataProto.State state =
getContainerData().getState();
if (!(state == ContainerProtos.ContainerDataProto.State.CLOSED ||
state == ContainerDataProto.State.QUASI_CLOSED)) {
throw new IllegalStateException(
"Only closed/quasi closed containers could be exported: " +
"Where as ContainerId="
+ getContainerData().getContainerID() + " is in state " +
state);
}
compactDB();
// Close DB (and remove from cache) to avoid concurrent modification
while
// packing it.
BlockUtils.removeDB(containerData, config);
packer.pack(this, destination);
} finally {
writeUnlock();
}
}
```
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