[hadoop] branch branch-3.2 updated: HDFS-14993. checkDiskError doesn't work during datanode startup. Contributed by Yang Yun.

[ay...@apache.org]

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ayushsaxena pushed a commit to branch branch-3.2
in repository https://gitbox.apache.org/repos/asf/hadoop.git


The following commit(s) were added to refs/heads/branch-3.2 by this push:
     new 8a1b02f  HDFS-14993. checkDiskError doesn't work during datanode startup. Contributed by Yang Yun.
8a1b02f is described below

commit 8a1b02f44cbef6f76c1e8d99cb7e4d7c0b2b240e
Author: Ayush Saxena <ay...@apache.org>
AuthorDate: Tue Jan 28 22:59:26 2020 +0530

    HDFS-14993. checkDiskError doesn't work during datanode startup. Contributed by Yang Yun.
---
 .../hadoop/hdfs/server/datanode/DataNode.java      |  6 ++---
 .../server/datanode/TestDataNodeVolumeFailure.java | 31 ++++++++++++++++++++++
 2 files changed, 34 insertions(+), 3 deletions(-)

diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java
index 7bb72df..cfe3054 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java
@@ -1678,14 +1678,14 @@ public class DataNode extends ReconfigurableBase
     // the dataset, block scanners, etc.
     initStorage(nsInfo);
 
-    // Exclude failed disks before initializing the block pools to avoid startup
-    // failures.
-    checkDiskError();
     try {
       data.addBlockPool(nsInfo.getBlockPoolID(), getConf());
     } catch (AddBlockPoolException e) {
       handleAddBlockPoolError(e);
     }
+    // HDFS-14993: check disk after add the block pool info.
+    checkDiskError();
+
     blockScanner.enableBlockPoolId(bpos.getBlockPoolId());
     initDirectoryScanner(getConf());
     initDiskBalancer(data, getConf());
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestDataNodeVolumeFailure.java b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestDataNodeVolumeFailure.java
index 4c691b4..d9ec2cd 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestDataNodeVolumeFailure.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestDataNodeVolumeFailure.java
@@ -868,4 +868,35 @@ public class TestDataNodeVolumeFailure {
       }
     }
   }
+
+  /*
+   * Verify the failed volume can be cheched during dn startup
+   */
+  @Test(timeout = 120000)
+  public void testVolumeFailureDuringStartup() throws Exception {
+    LOG.debug("Data dir: is " +  dataDir.getPath());
+
+    // fail the volume
+    data_fail = cluster.getInstanceStorageDir(1, 0);
+    failedDir = MiniDFSCluster.getFinalizedDir(data_fail,
+        cluster.getNamesystem().getBlockPoolId());
+    failedDir.setReadOnly();
+
+    // restart the dn
+    cluster.restartDataNode(1);
+    final DataNode dn = cluster.getDataNodes().get(1);
+
+    // should get the failed volume during startup
+    GenericTestUtils.waitFor(new Supplier<Boolean>() {
+      @Override
+      public Boolean get() {
+        return dn.getFSDataset() !=null &&
+            dn.getFSDataset().getVolumeFailureSummary() != null &&
+            dn.getFSDataset().getVolumeFailureSummary().
+                getFailedStorageLocations()!= null &&
+            dn.getFSDataset().getVolumeFailureSummary().
+                getFailedStorageLocations().length == 1;
+      }
+    }, 10, 30 * 1000);
+  }
 }


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