AHeise commented on a change in pull request #10952:
[FLINK-15777][filesystem]Determine Hadoop version with fs classpath.
URL: https://github.com/apache/flink/pull/10952#discussion_r371299272
##########
File path:
flink-filesystems/flink-hadoop-fs/src/main/java/org/apache/flink/runtime/fs/hdfs/HadoopRecoverableFsDataOutputStream.java
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@@ -175,44 +172,39 @@ private static void safelyTruncateFile(
}
}
- private static void ensureTruncateInitialized() throws
FlinkRuntimeException {
- if (HadoopUtils.isMinHadoopVersion(2, 7) && truncateHandle ==
null) {
- Method truncateMethod;
+ private static Method findTrunacteMethod(FileSystem fs) throws
FlinkRuntimeException {
+ Method truncateMethod = null;
+ if
(HadoopUtils.isMinHadoopVersion(fs.getClass().getClassLoader(), 2, 7)) {
try {
- truncateMethod =
FileSystem.class.getMethod("truncate", Path.class, long.class);
- }
- catch (NoSuchMethodException e) {
+ truncateMethod =
fs.getClass().getMethod("truncate", Path.class, long.class);
+ } catch (NoSuchMethodException e) {
throw new FlinkRuntimeException("Could not find
a public truncate method on the Hadoop File System.");
}
-
- if (!Modifier.isPublic(truncateMethod.getModifiers())) {
- throw new FlinkRuntimeException("Could not find
a public truncate method on the Hadoop File System.");
- }
-
- truncateHandle = truncateMethod;
Review comment:
`getMethod` is only return public members.
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