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YARN-7351. Fix high CPU usage issue in RegistryDNS. Contributed by Jian He

This commit is contained in:
Billie Rinaldi 2017-10-25 13:01:01 -07:00 committed by Jian He
parent 501be9b4be
commit d2775fbcca
1 changed files with 5 additions and 3 deletions
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8
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/main/java/org/apache/hadoop/registry/server/dns/RegistryDNS.java
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@ -189,7 +189,8 @@ public class RegistryDNS extends AbstractService implements DNSOperations,
LOG.info("Opening TCP and UDP channels on {} port {}", addr, port);
addNIOUDP(addr, port);
addNIOTCP(addr, port);
//TODO Fix dns lookup over TCP
// addNIOTCP(addr, port);
}
/**
@ -770,6 +771,7 @@ public class RegistryDNS extends AbstractService implements DNSOperations,
byte[] response = null;
try {
query = new Message(in);
LOG.info("received TCP query {}", query.getQuestion());
response = generateReply(query, ch.socket());
if (response == null) {
return;
@ -947,7 +949,7 @@ public class RegistryDNS extends AbstractService implements DNSOperations,
input.flip();
input.get(in);
query = new Message(in);
LOG.info("{}: received query {}", remoteAddress,
LOG.info("{}: received UDP query {}", remoteAddress,
query.getQuestion());
response = generateReply(query, null);
if (response == null) {
@ -960,7 +962,7 @@ public class RegistryDNS extends AbstractService implements DNSOperations,
output.put(response);
output.flip();
LOG.info("{}: sending response", remoteAddress);
LOG.debug("{}: sending response", remoteAddress);
channel.send(output, remoteAddress);
}
} catch (Exception e) {