Juan Yu created HDFS-8407:
-----------------------------
Summary: libhdfs hdfsListDirectory() API has different behavior
than documentation
Key: HDFS-8407
URL: https://issues.apache.org/jira/browse/HDFS-8407
Project: Hadoop HDFS
Issue Type: Bug
Components: HDFS
Reporter: Juan Yu
The documentation says it returns NULL on error, but it could also return NULL
when the directory is empty.
/**
* hdfsListDirectory - Get list of files/directories for a given
* directory-path. hdfsFreeFileInfo should be called to deallocate memory.
* @param fs The configured filesystem handle.
* @param path The path of the directory.
* @param numEntries Set to the number of files/directories in path.
* @return Returns a dynamically-allocated array of hdfsFileInfo
* objects; NULL on error.
*/
{code}
hdfsFileInfo *pathList = NULL;
...
//Figure out the number of entries in that directory
jPathListSize = (*env)->GetArrayLength(env, jPathList);
if (jPathListSize == 0) {
ret = 0;
goto done;
}
...
if (ret) {
hdfsFreeFileInfo(pathList, jPathListSize);
errno = ret;
return NULL;
}
*numEntries = jPathListSize;
return pathList;
{code}
Either change the implementation to match the doc, or fix the doc to match the
implementation.
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