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Posted to common-issues@hadoop.apache.org by GitBox <gi...@apache.org> on 2020/10/15 23:51:24 UTC
[GitHub] [hadoop] goiri commented on a change in pull request #2388: HDFS-15634 [WIP] Invalidate replica on decommissioning/decommissioned…
goiri commented on a change in pull request #2388:
URL: https://github.com/apache/hadoop/pull/2388#discussion_r505926806
##########
File path: hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
##########
@@ -3512,7 +3512,11 @@ private Block addStoredBlock(final BlockInfo block,
int numUsableReplicas = num.liveReplicas() +
num.decommissioning() + num.liveEnteringMaintenanceReplicas();
- if(storedBlock.getBlockUCState() == BlockUCState.COMMITTED &&
+
+ // if block is still under construction, then done for now
+ if (!storedBlock.isCompleteOrCommitted()) {
Review comment:
Why do we move this block here?
BTW we can leave it as a single if with a return.
##########
File path: hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
##########
@@ -3559,9 +3558,26 @@ private Block addStoredBlock(final BlockInfo block,
if ((corruptReplicasCount > 0) && (numLiveReplicas >= fileRedundancy)) {
invalidateCorruptReplicas(storedBlock, reportedBlock, num);
}
+ if (shouldInvalidateDecommissionedRedundancy(num, fileRedundancy)) {
+ for (DatanodeStorageInfo storage : blocksMap.getStorages(block)) {
+ final DatanodeDescriptor datanode = storage.getDatanodeDescriptor();
+ if (datanode.isDecommissioned()
+ || datanode.isDecommissionInProgress()) {
+ addToInvalidates(storedBlock, datanode);
+ }
+ }
+ }
return storedBlock;
}
+ // If there are enough live replicas, start invalidating
+ // decommissioned + decommissioning replicas
+ private boolean shouldInvalidateDecommissionedRedundancy(NumberReplicas num,
Review comment:
It makes sense. Maybe we should describe some of the JIRA description in this method to explain what we are doing in the high level.
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