Github user uce commented on a diff in the pull request:
https://github.com/apache/flink/pull/1524#discussion_r50253565
--- Diff: flink-core/src/main/java/org/apache/flink/core/fs/FileSystem.java
---
@@ -159,56 +164,91 @@ public int hashCode() {
/**
* Returns a reference to the {@link FileSystem} instance for accessing
the
* local file system.
- *
+ *
* @return a reference to the {@link FileSystem} instance for accessing
the
- * local file system.
+ * local file system.
*/
public static FileSystem getLocalFileSystem() {
// this should really never fail.
try {
URI localUri = OperatingSystem.isWindows() ? new
URI("file:/") : new URI("file:///");
return get(localUri);
- }
- catch (Exception e) {
+ } catch (Exception e) {
throw new RuntimeException("Cannot create URI for local
file system");
}
}
/**
+ * The default filesystem scheme to be used. This can be specified by
the parameter
+ * <code>fs.default-scheme</code> in <code>flink-conf.yaml</code>. By
default this is
+ * set to <code>file:///</code> and uses the local filesystem.
+ * */
+ private static URI defaultScheme;
+
+ /**
+ * Sets the default filesystem scheme based on the user-specified
configuration parameter
+ * <code>fs.default-scheme</code>.
+ * <li>
+ * As an example, if set to <code>hdfs://localhost:9000/</code>, then
an HDFS deployment
+ * with the namenode being on the local node and listening to port 9000
is going to be used.
+ * In this case, a file path specified as
<code>/user/USERNAME/in.txt</code>
+ * is going to be transformed into
<code>hdfs://localhost:9000/user/USERNAME/in.txt</code>. By
--- End diff --
Depending on what you think about my comments about the doc text, you could
also apply it here.
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