From 6791b29771892dff7ae8d16de2c99502162f2e69 Mon Sep 17 00:00:00 2001
From: Michael Stack <saintstack@users.noreply.github.com>
Date: Sat, 5 Dec 2020 08:55:59 -0800
Subject: [PATCH] HBASE-25361 [Flakey Tests] branch-2
 TestMetaRegionLocationCache.testStandByMetaLocations (#2736)

Add a bit of a wait before testing if online replicas match the zk count. It might take a
while for all replicas to come online.

Signed-off-by: huaxiangsun <huaxiangsun@apache.org>
---
 .../hadoop/hbase/client/TestMetaRegionLocationCache.java  | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestMetaRegionLocationCache.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestMetaRegionLocationCache.java
index d42c1240f9e..577e15cedfb 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestMetaRegionLocationCache.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestMetaRegionLocationCache.java
@@ -98,6 +98,14 @@ public class TestMetaRegionLocationCache {
     assertFalse(metaHRLs.isEmpty());
     ZKWatcher zk = master.getZooKeeper();
     List<String> metaZnodes = zk.getMetaReplicaNodes();
+    // Wait till all replicas available.
+    while (master.getMetaRegionLocationCache().getMetaRegionLocations().get().size() !=
+        metaZnodes.size()) {
+      Thread.sleep(1000);
+      if (++retries == 10) {
+        break;
+      }
+    }
     assertEquals(metaZnodes.size(), metaHRLs.size());
     List<HRegionLocation> actualHRLs = getCurrentMetaLocations(zk);
     Collections.sort(metaHRLs);