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HDFS-14940. HDFS Balancer : Do not allow to set balancer maximum network bandwidth more than 1TB. Contributed by hemanthboyina.

This commit is contained in:
Surendra Singh Lilhore 2019-11-22 00:31:25 +05:30
parent 98d249dcda
commit 26270196a2
3 changed files with 16 additions and 0 deletions
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2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/common/HdfsServerConstants.java
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@ -373,4 +373,6 @@ public interface HdfsServerConstants {
long BLOCK_GROUP_INDEX_MASK = 15;
byte MAX_BLOCKS_IN_GROUP = 16;
// maximum bandwidth per datanode 1TB/sec.
long MAX_BANDWIDTH_PER_DATANODE = 1099511627776L;
}

6
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNodeRpcServer.java
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@ -1431,6 +1431,12 @@ public class NameNodeRpcServer implements NamenodeProtocols {
*/
@Override // ClientProtocol
public void setBalancerBandwidth(long bandwidth) throws IOException {
if (bandwidth > HdfsServerConstants.MAX_BANDWIDTH_PER_DATANODE) {
throw new IllegalArgumentException(
"Bandwidth should not exceed maximum limit "
+ HdfsServerConstants.MAX_BANDWIDTH_PER_DATANODE
+ " bytes per second");
}
checkNNStartup();
namesystem.setBalancerBandwidth(bandwidth);
}

8
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestBalancerBandwidth.java
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@ -33,6 +33,7 @@ import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.server.datanode.DataNode;
import org.apache.hadoop.hdfs.tools.DFSAdmin;
import org.apache.hadoop.test.GenericTestUtils;
import org.apache.hadoop.util.ToolRunner;
import org.junit.Test;
/**
@ -102,6 +103,13 @@ public class TestBalancerBandwidth {
runGetBalancerBandwidthCmd(admin, args, newBandwidth);
args = new String[] { "-getBalancerBandwidth", dn2Address };
runGetBalancerBandwidthCmd(admin, args, newBandwidth);
// test maximum bandwidth allowed
assertEquals(0, ToolRunner.run(admin,
new String[] {"-setBalancerBandwidth", "1t"}));
assertEquals(-1, ToolRunner.run(admin,
new String[] {"-setBalancerBandwidth", "1e"}));
}
}