jojochuang commented on code in PR #4322:
URL: https://github.com/apache/hadoop/pull/4322#discussion_r909043772
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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java:
##########
@@ -1763,7 +1773,21 @@ public BlocksWithLocations getBlocksWithLocations(final
DatanodeID datanode,
void removeBlocksAssociatedTo(final DatanodeDescriptor node) {
providedStorageMap.removeDatanode(node);
final Iterator<BlockInfo> it = node.getBlockIterator();
+ int numBlocksRemovedPerLock = 0;
while(it.hasNext()) {
+ if (numBlocksRemovedPerLock >= numBlocksPerRemove) {
+ namesystem.writeUnlock();
+ try {
+ LOG.debug("Yielded lock during removing blocks associated to the
dead datanode"); //释放锁，并sleep 500ns（1 ns = 10-9 s）
Review Comment:
Please use English for comments.
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