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weichiu pushed a commit to branch branch-3.2
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The following commit(s) were added to refs/heads/branch-3.2 by this push:
new cb701f4 HDFS-14187. Make warning message more clear when there are
not enough data nodes for EC write. Contributed by Kitti Nanasi.
cb701f4 is described below
commit cb701f4da0bcd89d890ad0e0fccd48d70356137c
Author: Kitti Nanasi <knan...@cloudera.com>
AuthorDate: Thu Jan 31 16:06:45 2019 -0800
HDFS-14187. Make warning message more clear when there are not enough data
nodes for EC write. Contributed by Kitti Nanasi.
Signed-off-by: Wei-Chiu Chuang <weic...@apache.org>
(cherry picked from commit 0ab7fc92009fec2f0ab341f3d878e1b8864b8ea9)
---
.../src/main/java/org/apache/hadoop/hdfs/DFSStripedOutputStream.java | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git
a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSStripedOutputStream.java
b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSStripedOutputStream.java
index df9770e..97310ee 100644
---
a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSStripedOutputStream.java
+++
b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSStripedOutputStream.java
@@ -497,7 +497,10 @@ public class DFSStripedOutputStream extends DFSOutputStream
// Set exception and close streamer as there is no block locations
// found for the parity block.
LOG.warn("Cannot allocate parity block(index={}, policy={}). " +
- "Not enough datanodes? Exclude nodes={}", i, ecPolicy.getName(),
+ "Exclude nodes={}. There may not be enough datanodes or " +
+ "racks. You can check if the cluster topology supports " +
+ "the enabled erasure coding policies by running the command " +
+ "'hdfs ec -verifyClusterSetup'.", i, ecPolicy.getName(),
excludedNodes);
si.getLastException().set(
new IOException("Failed to get parity block, index=" + i));
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