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[ https://issues.apache.org/jira/browse/HADOOP-4416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12642436#action_12642436 ]

Steve Loughran commented on HADOOP-4416:
----------------------------------------

Looking at the patch,


1. You need tests of the default handling. The get operations are all calling .trim() before checking for the result being null; as a result they will probably NPE rather than return defaults

e.g, what happens on conf.getLong("undefined-key",23);

public long getLong(String name, long defaultValue) {
- String valueString = get(name);
+ String valueString = get(name).trim();
if (valueString == null)
return defaultValue;

2. I'd recommend the trim operation is made a (protected?) method in Configuration

protected String trim(String source) {
return source==null?source:source.trim();
}

One place to keep the logic, one test for null handling might suffice


3. the {{.toLowerCase()}} operation for getBoolean should be made locale neutral, by adding a locale parameter:
{{toLowerCase(Locale.EN_US)}}

4. Also, getBoolean shouldn't do any toLowerCase() operations on null values.

5. The changes to getBoolean() change the semantics of the operation. Currently

bool b=conf.getBoolean("something",false"); returns false if "something" is set to "TRUE" in the file. With the case change, it will evaluate to true. I don't know if this matters, but it isn't completely backwards compatible.
class names in Configuration are not resolved if the configuration value has a white space
-------------------------------------------------------------------------------------------

Key: HADOOP-4416
URL: https://issues.apache.org/jira/browse/HADOOP-4416
Project: Hadoop Core
Issue Type: Bug
Environment: all
Reporter: Alejandro Abdelnur
Assignee: Abhijit Bagri
Attachments: HADOOP-4416-v2.patch, HADOOP-4416.patch


If an entry in the configuration used for a class contains spaces or enters before or after the {{getClass}} and {{getClasses}} methods fail to resolve the class.
For example:
{code}
<property>
<name>mapred.mapper.class</name>
<value>
com.foo.MyMapper
</value>
</property>
{code}
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postedOct 15, '08 at 6:42a
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