[kudu] 01/05: [java] enable regression test for KUDU-2415

[al...@apache.org]

This is an automated email from the ASF dual-hosted git repository.

alexey pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/kudu.git

commit 3988ab934a0d34a4342fd3b6a97720944b7e5aeb
Author: Hao Hao <ha...@cloudera.com>
AuthorDate: Fri Jan 25 17:43:51 2019 -0800

    [java] enable regression test for KUDU-2415
    
    As KUDU-2463 fixed the bug in clean time advancement that now it is
    guaranteed to have a non-zero clean time when servicing a scan, it is
    safe to enable the regression test to ensure scanning a never-written-to
    tablet from a fresh client with no propagated timestamp in
    READ_YOUR_WRITE mode should work.
    
    I looped TestScannerMultiTablet 1000 times and no failures are observed.
    
    Change-Id: I9532a435c3b4cf2286630b6809ffa2c8ae1a4acd
    Reviewed-on: http://gerrit.cloudera.org:8080/12278
    Tested-by: Kudu Jenkins
    Reviewed-by: Hao Hao <ha...@cloudera.com>
---
 .../java/org/apache/kudu/client/TestScannerMultiTablet.java | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/java/kudu-client/src/test/java/org/apache/kudu/client/TestScannerMultiTablet.java b/java/kudu-client/src/test/java/org/apache/kudu/client/TestScannerMultiTablet.java
index dabe437..4ddcdd5 100644
--- a/java/kudu-client/src/test/java/org/apache/kudu/client/TestScannerMultiTablet.java
+++ b/java/kudu-client/src/test/java/org/apache/kudu/client/TestScannerMultiTablet.java
@@ -32,7 +32,6 @@ import com.stumbleupon.async.Deferred;
 
 import org.apache.kudu.test.KuduTestHarness;
 import org.junit.Before;
-import org.junit.Ignore;
 import org.junit.Rule;
 import org.junit.Test;
 
@@ -274,10 +273,7 @@ public class TestScannerMultiTablet {
   // Scanning a never-written-to tablet from a fresh client with no propagated
   // timestamp in "read-your-writes' mode should not fail.
   @Test(timeout = 100000)
-  @Ignore("TODO(KUDU-2415)") // not fixed yet!
   public void testReadYourWritesFreshClientFreshTable() throws Exception {
-    // NOTE: this test fails because the first tablet in the table
-    // is empty and has never been written to.
 
     // Perform scan in READ_YOUR_WRITES mode. Before the scan, verify that the
     // propagated timestamp is unset, since this is a fresh client.
@@ -289,7 +285,14 @@ public class TestScannerMultiTablet {
     assertEquals(AsyncKuduClient.NO_TIMESTAMP, asyncClient.getLastPropagatedTimestamp());
     assertEquals(AsyncKuduClient.NO_TIMESTAMP, scanner.getSnapshotTimestamp());
 
-    assertEquals(9, countRowsInScan(syncScanner));
+    // Since there isn't any write performed from the client, the count
+    // should range from [0, 9].
+    int count = countRowsInScan(syncScanner);
+    assertTrue(count >= 0);
+    assertTrue(count <= 9);
+
+    assertNotEquals(AsyncKuduClient.NO_TIMESTAMP, asyncClient.getLastPropagatedTimestamp());
+    assertNotEquals(AsyncKuduClient.NO_TIMESTAMP, scanner.getSnapshotTimestamp());
   }
 
   // Test multi tablets scan in READ_YOUR_WRITES mode for both AUTO_FLUSH_SYNC