sunhelly commented on a change in pull request #715: HBASE-22940 Fix snapshot
NoNode error
URL: https://github.com/apache/hbase/pull/715#discussion_r334311545
##########
File path:
hbase-server/src/main/java/org/apache/hadoop/hbase/master/snapshot/EnabledTableSnapshotHandler.java
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@@ -70,18 +68,10 @@ public EnabledTableSnapshotHandler prepare() throws
Exception {
*/
@Override
protected void snapshotRegions(List<Pair<RegionInfo, ServerName>> regions)
throws IOException {
- Set<String> regionServers = new HashSet<>(regions.size());
- for (Pair<RegionInfo, ServerName> region : regions) {
- if (region != null && region.getFirst() != null && region.getSecond() !=
null) {
- RegionInfo hri = region.getFirst();
- if (hri.isOffline() && (hri.isSplit() || hri.isSplitParent()))
continue;
- regionServers.add(region.getSecond().toString());
- }
- }
-
// start the snapshot on the RS
Procedure proc = coordinator.startProcedure(this.monitor,
this.snapshot.getName(),
- this.snapshot.toByteArray(), Lists.newArrayList(regionServers));
+ this.snapshot.toByteArray(),
master.getServerManager().getOnlineServersList()
+ .stream().map(ServerName::toString).collect(Collectors.toList()));
Review comment:
The problem is that all the RSes will add themselves to zk as
acquired/reached, but Procedure only set those where the table regions on as
barriers. So if all barriers reached, snapshot root node will be deleted, but
the none barrier RSes may write on it and throw exception.
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