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Posted to common-commits@hadoop.apache.org by sk...@apache.org on 2018/08/01 18:22:21 UTC
hadoop git commit: YARN-8600. RegistryDNS hang when remote lookup
does not reply. Contributed by Eric Yang
Repository: hadoop
Updated Branches:
refs/heads/trunk 67c65da26 -> 603a57476
YARN-8600. RegistryDNS hang when remote lookup does not reply. Contributed by Eric Yang
Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/603a5747
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/603a5747
Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/603a5747
Branch: refs/heads/trunk
Commit: 603a57476ce0bf9514f0432a235f29432ca4c323
Parents: 67c65da
Author: Shane Kumpf <sk...@apache.org>
Authored: Wed Aug 1 12:22:01 2018 -0600
Committer: Shane Kumpf <sk...@apache.org>
Committed: Wed Aug 1 12:22:01 2018 -0600
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.../hadoop/registry/server/dns/LookupTask.java | 39 ++++++++++++++++++++
.../hadoop/registry/server/dns/RegistryDNS.java | 21 ++++++++---
.../registry/server/dns/TestRegistryDNS.java | 8 ++++
3 files changed, 63 insertions(+), 5 deletions(-)
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http://git-wip-us.apache.org/repos/asf/hadoop/blob/603a5747/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/main/java/org/apache/hadoop/registry/server/dns/LookupTask.java
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diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/main/java/org/apache/hadoop/registry/server/dns/LookupTask.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/main/java/org/apache/hadoop/registry/server/dns/LookupTask.java
new file mode 100644
index 0000000..c2fc4a9
--- /dev/null
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/main/java/org/apache/hadoop/registry/server/dns/LookupTask.java
@@ -0,0 +1,39 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.registry.server.dns;
+
+import java.util.concurrent.Callable;
+
+import org.xbill.DNS.Lookup;
+import org.xbill.DNS.Name;
+import org.xbill.DNS.Record;
+
+public class LookupTask implements Callable<Record[]> {
+
+ private Name name;
+ private int type;
+
+ public LookupTask(Name name, int type) {
+ this.name = name;
+ this.type = type;
+ }
+
+ @Override
+ public Record[] call() throws Exception {
+ return new Lookup(name, type).run();
+ }
+}
http://git-wip-us.apache.org/repos/asf/hadoop/blob/603a5747/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/main/java/org/apache/hadoop/registry/server/dns/RegistryDNS.java
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diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/main/java/org/apache/hadoop/registry/server/dns/RegistryDNS.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/main/java/org/apache/hadoop/registry/server/dns/RegistryDNS.java
index 0022843..52e49a3 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/main/java/org/apache/hadoop/registry/server/dns/RegistryDNS.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/main/java/org/apache/hadoop/registry/server/dns/RegistryDNS.java
@@ -99,9 +99,13 @@ import java.util.Properties;
import java.util.concurrent.Callable;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
@@ -941,7 +945,7 @@ public class RegistryDNS extends AbstractService implements DNSOperations,
* @param port local port.
* @throws IOException if the UDP processing fails.
*/
- private void serveNIOUDP(DatagramChannel channel,
+ private synchronized void serveNIOUDP(DatagramChannel channel,
InetAddress addr, int port) throws Exception {
SocketAddress remoteAddress = null;
try {
@@ -1177,13 +1181,20 @@ public class RegistryDNS extends AbstractService implements DNSOperations,
* @return DNS records
*/
protected Record[] getRecords(Name name, int type) {
+ Record[] result = null;
+ ExecutorService executor = Executors.newSingleThreadExecutor();
+ Future<Record[]> future = executor.submit(new LookupTask(name, type));
try {
- return new Lookup(name, type).run();
- } catch (NullPointerException |
+ result = future.get(1500, TimeUnit.MILLISECONDS);
+ return result;
+ } catch (InterruptedException | ExecutionException |
+ TimeoutException | NullPointerException |
ExceptionInInitializerError e) {
- LOG.error("Fail to lookup: " + name, e);
+ LOG.warn("Failed to lookup: {} type: {}", name, Type.string(type), e);
+ return result;
+ } finally {
+ executor.shutdown();
}
- return null;
}
/**
http://git-wip-us.apache.org/repos/asf/hadoop/blob/603a5747/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/test/java/org/apache/hadoop/registry/server/dns/TestRegistryDNS.java
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diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/test/java/org/apache/hadoop/registry/server/dns/TestRegistryDNS.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/test/java/org/apache/hadoop/registry/server/dns/TestRegistryDNS.java
index 969faf9..a0c4ca3 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/test/java/org/apache/hadoop/registry/server/dns/TestRegistryDNS.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/test/java/org/apache/hadoop/registry/server/dns/TestRegistryDNS.java
@@ -697,6 +697,14 @@ public class TestRegistryDNS extends Assert {
assertTrue("not an ARecord", recs[0] instanceof ARecord);
assertTrue("not an ARecord", recs[1] instanceof ARecord);
}
+
+ @Test(timeout=5000)
+ public void testUpstreamFault() throws Exception {
+ Name name = Name.fromString("19.0.17.172.in-addr.arpa.");
+ Record[] recs = getRegistryDNS().getRecords(name, Type.CNAME);
+ assertNull("Record is not null", recs);
+ }
+
public RegistryDNS getRegistryDNS() {
return registryDNS;
}
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