teng wang created MAPREDUCE-7424:
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Summary: Document Fix: the dependency between
mapreduce.job.sharedcache.mode and yarn.sharedcache.enabled
Key: MAPREDUCE-7424
URL: https://issues.apache.org/jira/browse/MAPREDUCE-7424
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: job submission
Affects Versions: 3.3.4
Reporter: teng wang
Suggestions to fix the document (description of mapreduce.job.sharedcache.mode
in mapred-default.xml):
There is one dependency between mapreduce.job.sharedcache.mode and
yarn.sharedcache.enabled in source code. That is,
mapreduce.job.sharedcache.mode can work if the shared cache
(yarn.sharedcache.enabled) is enabled. However, the document
(mapred-default.xml) does not mention it, which could affects the use of this
configuration.
The dependency code:
```
/* /apache/hadoop/mapreduce/SharedCacheConfig.java */
public void init(Configuration conf) {
if(!conf.getBoolean(YarnConfiguration.SHARED_CACHE_ENABLED,
YarnConfiguration.DEFAULT_SHARED_CACHE_ENABLED)) {
return;
}
Collection<String> configs = StringUtils.getTrimmedStringCollection(
conf.get(MRJobConfig.SHARED_CACHE_MODE,
MRJobConfig.SHARED_CACHE_MODE_DEFAULT));
if (configs.contains("files")) {
this.sharedCacheFilesEnabled = true;
}
```
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