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HBASE-27169 TestSeparateClientZKCluster is flaky #4587

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Jul 1, 2022
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HBASE-27169 TestSeparateClientZKCluster is flaky #4587

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23 changes: 21 additions & 2 deletions hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSeparateClientZKCluster.java
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Original file line number Diff line number Diff line change
Expand Up @@ -19,9 +19,9 @@

import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import java.io.File;
import java.io.IOException;
import org.apache.commons.io.FileUtils;
import org.apache.hadoop.hbase.HBaseClassTestRule;
import org.apache.hadoop.hbase.HBaseTestingUtil;
Expand All @@ -40,6 +40,7 @@
import org.apache.hadoop.hbase.util.JVMClusterUtil.RegionServerThread;
import org.apache.hadoop.hbase.zookeeper.MiniZooKeeperCluster;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.ClassRule;
import org.junit.Rule;
Expand Down Expand Up @@ -100,6 +101,24 @@ public static void afterAllTests() throws Exception {
FileUtils.deleteDirectory(clientZkDir);
}

@Before
public void setUp() throws IOException {
try (Admin admin = TEST_UTIL.getConnection().getAdmin()) {
waitForNewMasterUpAndAddressSynced(admin);
}
}

private void waitForNewMasterUpAndAddressSynced(Admin admin) {
TEST_UTIL.waitFor(30000, () -> {
try {
return admin.listNamespaces().length > 0;
} catch (Exception e) {
LOG.warn("failed to list namespaces", e);
return false;
}
});
}

@Test
public void testBasicOperation() throws Exception {
TableName tn = name.getTableName();
Expand Down Expand Up @@ -139,7 +158,7 @@ public void testMasterSwitch() throws Exception {
() -> cluster.getMaster() != null && cluster.getMaster().isInitialized());
LOG.info("Got master {}", cluster.getMaster().getServerName());
// confirm client access still works
assertTrue(admin.balance(BalanceRequest.defaultInstance()).isBalancerRan());
waitForNewMasterUpAndAddressSynced(admin);
}
}

Expand Down