hanishakoneru commented on a change in pull request #884: HDDS-1620. Implement
Volume Write Requests to use Cache and DoubleBuffer.
URL: https://github.com/apache/hadoop/pull/884#discussion_r292230965
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File path:
hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/OmMetadataManagerImpl.java
##########
@@ -451,6 +456,21 @@ private boolean startsWith(byte[] firstArray, byte[]
secondArray) {
public boolean isVolumeEmpty(String volume) throws IOException {
String volumePrefix = getVolumeKey(volume + OM_KEY_PREFIX);
+ if (bucketTable instanceof TypedTable) {
+ // First check in bucket table cache.
+ Iterator<Map.Entry<CacheKey<String>, CacheValue<OmBucketInfo>>> iterator
=
+ ((TypedTable< String, OmBucketInfo>) bucketTable).cacheIterator();
+ while (iterator.hasNext()) {
+ Map.Entry< CacheKey< String >, CacheValue< OmBucketInfo > > entry =
+ iterator.next();
+ String key = entry.getKey().getKey();
+ OmBucketInfo omBucketInfo = entry.getValue().getValue();
+ if (key.startsWith(volumePrefix) && omBucketInfo != null) {
Review comment:
Can you please add a comment here as to why we require to check that
omBucketInfo is not null (to make sure that the entry is not for a delete
bucket request).
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