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shashikant pushed a commit to branch trunk
in repository https://gitbox.apache.org/repos/asf/hadoop.git
The following commit(s) were added to refs/heads/trunk by this push:
new ba43233 HDDS-1749 : Ozone Client should randomize the list of nodes
in pipeline for reads. (#1124)
ba43233 is described below
commit ba43233451128118e999f51f7c52f2d50993b56e
Author: avijayanhwx <[email protected]>
AuthorDate: Thu Jul 25 07:54:46 2019 -0700
HDDS-1749 : Ozone Client should randomize the list of nodes in pipeline for
reads. (#1124)
---
.../src/main/java/org/apache/hadoop/hdds/scm/XceiverClientGrpc.java | 4 ++++
1 file changed, 4 insertions(+)
diff --git
a/hadoop-hdds/client/src/main/java/org/apache/hadoop/hdds/scm/XceiverClientGrpc.java
b/hadoop-hdds/client/src/main/java/org/apache/hadoop/hdds/scm/XceiverClientGrpc.java
index eee813f..9f99ab5 100644
---
a/hadoop-hdds/client/src/main/java/org/apache/hadoop/hdds/scm/XceiverClientGrpc.java
+++
b/hadoop-hdds/client/src/main/java/org/apache/hadoop/hdds/scm/XceiverClientGrpc.java
@@ -54,6 +54,7 @@ import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.IOException;
+import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@@ -269,6 +270,9 @@ public class XceiverClientGrpc extends XceiverClientSpi {
datanodeList = pipeline.getNodesInOrder();
} else {
datanodeList = pipeline.getNodes();
+ // Shuffle datanode list so that clients do not read in the same order
+ // every time.
+ Collections.shuffle(datanodeList);
}
for (DatanodeDetails dn : datanodeList) {
try {
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