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HDFS-9519. Some coding improvement in SecondaryNameNode#main. (Xiao Chen via Yongjun Zhang)

This commit is contained in:
Yongjun Zhang 2015-12-11 18:44:01 -08:00
parent f5a911452f
commit 2a4c7d4fac
2 changed files with 9 additions and 8 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -1742,6 +1742,9 @@ Release 2.8.0 - UNRELEASED
HDFS-9532. Detailed exception info is lost in reportTo methods of
ErrorReportAction and ReportBadBlockAction. (Yongjun Zhang)
HDFS-9519. Some coding improvement in SecondaryNameNode#main.
(Xiao Chen via Yongjun Zhang)
OPTIMIZATIONS
HDFS-8026. Trace FSOutputSummer#writeChecksumChunks rather than

14
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/SecondaryNameNode.java
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@ -679,18 +679,16 @@ public static void main(String[] argv) throws Exception {
SecondaryNameNode secondary = null;
secondary = new SecondaryNameNode(tconf, opts);
// SecondaryNameNode can be started in 2 modes:
// 1. run a command (i.e. checkpoint or geteditsize) then terminate
// 2. run as a daemon when {@link #parseArgs} yields no commands
if (opts != null && opts.getCommand() != null) {
// mode 1
int ret = secondary.processStartupCommand(opts);
terminate(ret);
}
if (secondary != null) {
// The web server is only needed when starting SNN as a daemon,
// and not needed if called from shell command. Starting the web server
// from shell may fail when getting credentials, if the environment
// is not set up for it, which is most of the case.
} else {
// mode 2
secondary.startInfoServer();
secondary.startCheckpointThread();
secondary.join();
}