Another effort on fixing the transient error for XXXServerViewTest

server/src/test/java/io/druid/client/BrokerServerViewTest.java

@@ -25,7 +25,6 @@
 import com.google.common.base.Function;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
-import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Iterables;
 import com.google.common.collect.Lists;
 import com.metamx.common.Pair;
@@ -47,8 +46,6 @@
 import io.druid.timeline.partition.NoneShardSpec;
 import io.druid.timeline.partition.PartitionHolder;
 import io.druid.timeline.partition.SingleElementPartitionChunk;
-import org.apache.curator.utils.ZKPaths;
-import org.apache.zookeeper.CreateMode;
 import org.easymock.EasyMock;
 import org.joda.time.Interval;
 import org.junit.After;
@@ -65,8 +62,6 @@ public class BrokerServerViewTest extends CuratorTestBase
 {
   private final ObjectMapper jsonMapper;
   private final ZkPathsConfig zkPathsConfig;
-  private final String announcementsPath;
-  private final String inventoryPath;
 
   private CountDownLatch segmentViewInitLatch;
   private CountDownLatch segmentAddedLatch;
@@ -79,8 +74,6 @@ public BrokerServerViewTest()
   {
     jsonMapper = new DefaultObjectMapper();
     zkPathsConfig = new ZkPathsConfig();
-    announcementsPath = zkPathsConfig.getAnnouncementsPath();
-    inventoryPath = zkPathsConfig.getLiveSegmentsPath();
   }
 
   @Before
@@ -111,7 +104,7 @@ public void testSingleServerAddedRemovedSegment() throws Exception
     setupZNodeForServer(druidServer, zkPathsConfig, jsonMapper);
 
     final DataSegment segment = dataSegmentWithIntervalAndVersion("2014-10-20T00:00:00Z/P1D", "v1");
-    announceSegmentForServer(druidServer, segment);
+    announceSegmentForServer(druidServer, segment, zkPathsConfig, jsonMapper);
     Assert.assertTrue(timing.forWaiting().awaitLatch(segmentViewInitLatch));
     Assert.assertTrue(timing.forWaiting().awaitLatch(segmentAddedLatch));
 
@@ -137,7 +130,7 @@ public void testSingleServerAddedRemovedSegment() throws Exception
     Assert.assertEquals(segment, selector.getSegment());
     Assert.assertEquals(druidServer, selector.pick().getServer());
 
-    unannounceSegmentForServer(druidServer, segment);
+    unannounceSegmentForServer(druidServer, segment, zkPathsConfig);
     Assert.assertTrue(timing.forWaiting().awaitLatch(segmentRemovedLatch));
 
     Assert.assertEquals(
@@ -199,7 +192,7 @@ public DataSegment apply(Pair<String, String> input)
     );
 
     for (int i = 0; i < 5; ++i) {
-      announceSegmentForServer(druidServers.get(i), segments.get(i));
+      announceSegmentForServer(druidServers.get(i), segments.get(i), zkPathsConfig, jsonMapper);
     }
     Assert.assertTrue(timing.forWaiting().awaitLatch(segmentViewInitLatch));
     Assert.assertTrue(timing.forWaiting().awaitLatch(segmentAddedLatch));
@@ -219,7 +212,7 @@ public DataSegment apply(Pair<String, String> input)
     );
 
     // unannounce the segment created by dataSegmentWithIntervalAndVersion("2011-04-01/2011-04-09", "v2")
-    unannounceSegmentForServer(druidServers.get(2), segments.get(2));
+    unannounceSegmentForServer(druidServers.get(2), segments.get(2), zkPathsConfig);
     Assert.assertTrue(timing.forWaiting().awaitLatch(segmentRemovedLatch));
 
     // renew segmentRemovedLatch since we still have 4 segments to unannounce
@@ -244,7 +237,7 @@ public DataSegment apply(Pair<String, String> input)
     for (int i = 0; i < 5; ++i) {
       // skip the one that was previously unannounced
       if (i != 2) {
-        unannounceSegmentForServer(druidServers.get(i), segments.get(i));
+        unannounceSegmentForServer(druidServers.get(i), segments.get(i), zkPathsConfig);
       }
     }
     Assert.assertTrue(timing.forWaiting().awaitLatch(segmentRemovedLatch));
@@ -255,29 +248,6 @@ public DataSegment apply(Pair<String, String> input)
     );
   }
 
-  private void announceSegmentForServer(DruidServer druidServer, DataSegment segment) throws Exception
-  {
-    curator.create()
-           .compressed()
-           .withMode(CreateMode.EPHEMERAL)
-           .forPath(
-               ZKPaths.makePath(ZKPaths.makePath(inventoryPath, druidServer.getHost()), segment.getIdentifier()),
-               jsonMapper.writeValueAsBytes(
-                   ImmutableSet.<DataSegment>of(segment)
-               )
-           );
-  }
-
-  private void unannounceSegmentForServer(DruidServer druidServer, DataSegment segment) throws Exception
-  {
-    curator.delete().guaranteed().forPath(
-        ZKPaths.makePath(
-            ZKPaths.makePath(inventoryPath, druidServer.getHost()),
-            segment.getIdentifier()
-        )
-    );
-  }
-
   private Pair<Interval, Pair<String, Pair<DruidServer, DataSegment>>> createExpected(
       String intervalStr,
       String version,

server/src/test/java/io/druid/client/CoordinatorServerViewTest.java

@@ -23,7 +23,6 @@
 import com.google.common.base.Function;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
-import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Iterables;
 import com.google.common.collect.Lists;
 import com.metamx.common.Pair;
@@ -38,7 +37,6 @@
 import io.druid.timeline.partition.NoneShardSpec;
 import io.druid.timeline.partition.PartitionHolder;
 import org.apache.curator.utils.ZKPaths;
-import org.apache.zookeeper.CreateMode;
 import org.joda.time.Interval;
 import org.junit.After;
 import org.junit.Assert;
@@ -54,7 +52,6 @@ public class CoordinatorServerViewTest extends CuratorTestBase
 {
   private final ObjectMapper jsonMapper;
   private final ZkPathsConfig zkPathsConfig;
-  private final String announcementsPath;
   private final String inventoryPath;
 
   private CountDownLatch segmentViewInitLatch;
@@ -68,7 +65,6 @@ public CoordinatorServerViewTest()
   {
     jsonMapper = new DefaultObjectMapper();
     zkPathsConfig = new ZkPathsConfig();
-    announcementsPath = zkPathsConfig.getAnnouncementsPath();
     inventoryPath = zkPathsConfig.getLiveSegmentsPath();
   }
 
@@ -100,7 +96,7 @@ public void testSingleServerAddedRemovedSegment() throws Exception
     setupZNodeForServer(druidServer, zkPathsConfig, jsonMapper);
 
     final DataSegment segment = dataSegmentWithIntervalAndVersion("2014-10-20T00:00:00Z/P1D", "v1");
-    announceSegmentForServer(druidServer, segment);
+    announceSegmentForServer(druidServer, segment, zkPathsConfig, jsonMapper);
     Assert.assertTrue(timing.forWaiting().awaitLatch(segmentViewInitLatch));
     Assert.assertTrue(timing.forWaiting().awaitLatch(segmentAddedLatch));
 
@@ -122,7 +118,10 @@ public void testSingleServerAddedRemovedSegment() throws Exception
 
     SegmentLoadInfo segmentLoadInfo = actualPartitionHolder.iterator().next().getObject();
     Assert.assertFalse(segmentLoadInfo.isEmpty());
-    Assert.assertEquals(druidServer.getMetadata(), Iterables.getOnlyElement(segmentLoadInfo.toImmutableSegmentLoadInfo().getServers()));
+    Assert.assertEquals(
+        druidServer.getMetadata(),
+        Iterables.getOnlyElement(segmentLoadInfo.toImmutableSegmentLoadInfo().getServers())
+    );
 
     unannounceSegmentForServer(druidServer, segment);
     Assert.assertTrue(timing.forWaiting().awaitLatch(segmentRemovedLatch));
@@ -186,7 +185,7 @@ public DataSegment apply(Pair<String, String> input)
     );
 
     for (int i = 0; i < 5; ++i) {
-      announceSegmentForServer(druidServers.get(i), segments.get(i));
+      announceSegmentForServer(druidServers.get(i), segments.get(i), zkPathsConfig, jsonMapper);
     }
     Assert.assertTrue(timing.forWaiting().awaitLatch(segmentViewInitLatch));
     Assert.assertTrue(timing.forWaiting().awaitLatch(segmentAddedLatch));
@@ -242,19 +241,6 @@ public DataSegment apply(Pair<String, String> input)
     );
   }
 
-  private void announceSegmentForServer(DruidServer druidServer, DataSegment segment) throws Exception
-  {
-    curator.create()
-           .compressed()
-           .withMode(CreateMode.EPHEMERAL)
-           .forPath(
-               ZKPaths.makePath(ZKPaths.makePath(inventoryPath, druidServer.getHost()), segment.getIdentifier()),
-               jsonMapper.writeValueAsBytes(
-                   ImmutableSet.<DataSegment>of(segment)
-               )
-           );
-  }
-
   private void unannounceSegmentForServer(DruidServer druidServer, DataSegment segment) throws Exception
   {
     curator.delete().guaranteed().forPath(
@@ -283,7 +269,7 @@ private void assertValues(
 
     for (int i = 0; i < expected.size(); ++i) {
       Pair<Interval, Pair<String, Pair<DruidServer, DataSegment>>> expectedPair = expected.get(i);
-      TimelineObjectHolder<String,SegmentLoadInfo> actualTimelineObjectHolder = actual.get(i);
+      TimelineObjectHolder<String, SegmentLoadInfo> actualTimelineObjectHolder = actual.get(i);
 
       Assert.assertEquals(expectedPair.lhs, actualTimelineObjectHolder.getInterval());
       Assert.assertEquals(expectedPair.rhs.lhs, actualTimelineObjectHolder.getVersion());
@@ -292,9 +278,10 @@ private void assertValues(
       Assert.assertTrue(actualPartitionHolder.isComplete());
       Assert.assertEquals(1, Iterables.size(actualPartitionHolder));
 
-      SegmentLoadInfo segmentLoadInfo =  actualPartitionHolder.iterator().next().getObject();
+      SegmentLoadInfo segmentLoadInfo = actualPartitionHolder.iterator().next().getObject();
       Assert.assertFalse(segmentLoadInfo.isEmpty());
-      Assert.assertEquals(expectedPair.rhs.rhs.lhs.getMetadata(),Iterables.getOnlyElement(segmentLoadInfo.toImmutableSegmentLoadInfo().getServers()));
+      Assert.assertEquals(expectedPair.rhs.rhs.lhs.getMetadata(),
+                          Iterables.getOnlyElement(segmentLoadInfo.toImmutableSegmentLoadInfo().getServers()));
     }
   }
 

server/src/test/java/io/druid/curator/CuratorTestBase.java

@@ -20,15 +20,20 @@
 package io.druid.curator;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.api.client.repackaged.com.google.common.base.Throwables;
+import com.google.common.collect.ImmutableSet;
 import com.metamx.common.guava.CloseQuietly;
 import io.druid.client.DruidServer;
 import io.druid.server.initialization.ZkPathsConfig;
+import io.druid.timeline.DataSegment;
 import org.apache.curator.framework.CuratorFramework;
 import org.apache.curator.framework.CuratorFrameworkFactory;
 import org.apache.curator.retry.RetryOneTime;
 import org.apache.curator.test.TestingServer;
 import org.apache.curator.test.Timing;
 import org.apache.curator.utils.ZKPaths;
+import org.apache.zookeeper.CreateMode;
+import org.apache.zookeeper.KeeperException;
 
 /**
  */
@@ -54,40 +59,103 @@ protected void setupServerAndCurator() throws Exception
   }
 
   protected void setupZNodeForServer(DruidServer server, ZkPathsConfig zkPathsConfig, ObjectMapper jsonMapper)
-      throws Exception
   {
     final String announcementsPath = zkPathsConfig.getAnnouncementsPath();
     final String inventoryPath = zkPathsConfig.getLiveSegmentsPath();
 
-    final String zNodePathAnnounce = ZKPaths.makePath(announcementsPath, server.getHost());
-    final String zNodePathSegment = ZKPaths.makePath(inventoryPath, server.getHost());
+    try {
+      curator.create()
+             .creatingParentsIfNeeded()
+             .forPath(
+                 ZKPaths.makePath(announcementsPath, server.getHost()),
+                 jsonMapper.writeValueAsBytes(server.getMetadata())
+             );
+      curator.create()
+             .creatingParentsIfNeeded()
+             .forPath(ZKPaths.makePath(inventoryPath, server.getHost()));
+    }
+    catch (KeeperException.NodeExistsException e) {
+      /*
+       * For some reason, Travis build sometimes fails here because of
+       * org.apache.zookeeper.KeeperException$NodeExistsException: KeeperErrorCode = NodeExists, though it should never
+       * happen because zookeeper should be in a clean state for each run of tests.
+       * Address issue: https://github.com/druid-io/druid/issues/1512
+       */
+      try {
+        curator.setData()
+               .forPath(
+                   ZKPaths.makePath(announcementsPath, server.getHost()),
+                   jsonMapper.writeValueAsBytes(server.getMetadata())
+               );
+        curator.setData()
+               .forPath(ZKPaths.makePath(inventoryPath, server.getHost()));
+      }
+      catch (Exception e1) {
+        Throwables.propagate(e1);
+      }
+    }
+    catch (Exception e) {
+      Throwables.propagate(e);
+    }
+  }
+
+  protected void announceSegmentForServer(
+      DruidServer druidServer,
+      DataSegment segment,
+      ZkPathsConfig zkPathsConfig,
+      ObjectMapper jsonMapper
+  )
+  {
+    final String segmentAnnouncementPath = ZKPaths.makePath(ZKPaths.makePath(
+        zkPathsConfig.getLiveSegmentsPath(),
+        druidServer.getHost()
+    ), segment.getIdentifier());
 
-    /*
-     * Explicitly check whether the zNodes we are about to create exist or not,
-     * if exist, delete them to make sure we have a clean state on zookeeper.
-     * Address issue: https://github.com/druid-io/druid/issues/1512
-     */
-    if (curator.checkExists().forPath(zNodePathAnnounce) != null) {
-      curator.delete().guaranteed().forPath(zNodePathAnnounce);
+    try {
+      curator.create()
+             .compressed()
+             .withMode(CreateMode.EPHEMERAL)
+             .forPath(
+                 segmentAnnouncementPath,
+                 jsonMapper.writeValueAsBytes(
+                     ImmutableSet.<DataSegment>of(segment)
+                 )
+             );
     }
-    if (curator.checkExists().forPath(zNodePathSegment) != null) {
-      curator.delete().guaranteed().forPath(zNodePathSegment);
+    catch (KeeperException.NodeExistsException e) {
+      try {
+        curator.setData()
+               .forPath(
+                   segmentAnnouncementPath,
+                   jsonMapper.writeValueAsBytes(ImmutableSet.<DataSegment>of(segment))
+               );
+      }
+      catch (Exception e1) {
+        Throwables.propagate(e1);
+      }
     }
+    catch (Exception e) {
+      Throwables.propagate(e);
+    }
+  }
 
-    curator.create()
-           .creatingParentsIfNeeded()
-           .forPath(
-               ZKPaths.makePath(announcementsPath, server.getHost()),
-               jsonMapper.writeValueAsBytes(server.getMetadata())
-           );
-    curator.create()
-           .creatingParentsIfNeeded()
-           .forPath(ZKPaths.makePath(inventoryPath, server.getHost()));
+  protected void unannounceSegmentForServer(DruidServer druidServer, DataSegment segment, ZkPathsConfig zkPathsConfig)
+      throws Exception
+  {
+    curator.delete().guaranteed().forPath(
+        ZKPaths.makePath(
+            ZKPaths.makePath(zkPathsConfig.getLiveSegmentsPath(), druidServer.getHost()),
+            segment.getIdentifier()
+        )
+    );
   }
 
   protected void tearDownServerAndCurator()
   {
     CloseQuietly.close(curator);
     CloseQuietly.close(server);
   }
+
 }
+
+//Build at Tue Dec 22 21:30:00 CST 2015