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HDFS-3008. Negative caching of local addrs doesn't work. Contributed by Eli Collins

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1293419 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Eli Collins 2012-02-24 21:14:04 +00:00
parent 0e79131981
commit 78f22bc525
2 changed files with 8 additions and 4 deletions
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2
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -280,6 +280,8 @@ Release 0.23.2 - UNRELEASED
dfs.client.block.write.replace-datanode-on-failure.enable should be true.
(szetszwo)
HDFS-3008. Negative caching of local addrs doesn't work. (eli)
Release 0.23.1 - 2012-02-17
INCOMPATIBLE CHANGES

10
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSClient.java
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@ -542,17 +542,19 @@ static BlockReader getLocalBlockReader(Configuration conf,
private static boolean isLocalAddress(InetSocketAddress targetAddr) {
InetAddress addr = targetAddr.getAddress();
Boolean cached = localAddrMap.get(addr.getHostAddress());
if (cached != null && cached) {
if (cached != null) {
if (LOG.isTraceEnabled()) {
LOG.trace("Address " + targetAddr + " is local");
LOG.trace("Address " + targetAddr +
(cached ? " is local" : " is not local"));
}
return true;
return cached;
}
boolean local = NetUtils.isLocalAddress(addr);
if (LOG.isTraceEnabled()) {
LOG.trace("Address " + targetAddr + " is local");
LOG.trace("Address " + targetAddr +
(local ? " is local" : " is not local"));
}
localAddrMap.put(addr.getHostAddress(), local);
return local;