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HDFS-7714. Simultaneous restart of HA NameNodes and DataNode can cause DataNode to register successfully with only one NameNode.(Contributed by Vinayakumar B)

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(cherry picked from commit 3d15728ff5301296801e541d9b23bd1687c4adad)
(cherry picked from commit a1bf7aecf7d018c5305fa3bd7a9e3ef9af3155c1)
(cherry picked from commit c1e65de57e8ef760586e28cd37397ea9a7ac7944)
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Vinayakumar B 2015-02-10 10:43:08 +05:30 committed by Vinod Kumar Vavilapalli
parent a703952d39
commit 6154abfeda
2 changed files with 8 additions and 0 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -70,6 +70,9 @@ Release 2.6.1 - UNRELEASED
HDFS-7707. Edit log corruption due to delayed block removal again.
(Yongjun Zhang via kihwal)
HDFS-7714. Simultaneous restart of HA NameNodes and DataNode can cause
DataNode to register successfully with only one NameNode.(vinayakumarb)
Release 2.6.0 - 2014-11-18
INCOMPATIBLE CHANGES

5
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPServiceActor.java
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@ -19,6 +19,7 @@
import static org.apache.hadoop.util.Time.now;
import java.io.EOFException;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.SocketTimeoutException;
@ -802,6 +803,10 @@ void register() throws IOException {
// Use returned registration from namenode with updated fields
bpRegistration = bpNamenode.registerDatanode(bpRegistration);
break;
} catch(EOFException e) { // namenode might have just restarted
LOG.info("Problem connecting to server: " + nnAddr + " :"
+ e.getLocalizedMessage());
sleepAndLogInterrupts(1000, "connecting to server");
} catch(SocketTimeoutException e) { // namenode is busy
LOG.info("Problem connecting to server: " + nnAddr);
sleepAndLogInterrupts(1000, "connecting to server");