pjfanning commented on code in PR #7428:
URL: https://github.com/apache/hadoop/pull/7428#discussion_r1968300209
##########
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/web/WebHdfsFileSystem.java:
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@@ -846,14 +846,36 @@ private T runWithRetry() throws IOException {
node = url.getAuthority();
}
try {
- IOException newIoe = ioe.getClass().getConstructor(String.class)
- .newInstance(node + ": " + ioe.getMessage());
- newIoe.initCause(ioe.getCause());
+ final Throwable cause = ioe.getCause();
+ IOException newIoe = null;
+ if (cause != null) {
+ try {
+ DynConstructors.Ctor<? extends IOException> ctor =
+ new DynConstructors.Builder()
+ .impl(ioe.getClass(), String.class, Throwable.class)
+ .buildChecked();
+ newIoe = ctor.newInstance(node + ": " + ioe.getMessage(),
cause);
+ } catch (NoSuchMethodException e) {
+ // no matching constructor - try next approach below
+ }
+ }
+ if (newIoe == null) {
+ DynConstructors.Ctor<? extends IOException> ctor =
+ new DynConstructors.Builder()
+ .impl(ioe.getClass(), String.class)
+ .buildChecked();
+ newIoe = ctor.newInstance(node + ": " + ioe.getMessage());
+ if (cause != null) {
+ try {
+ newIoe.initCause(cause);
+ } catch (Exception e) {
+ // Unable to initCause. Ignore the exception.
+ }
+ }
+ }
newIoe.setStackTrace(ioe.getStackTrace());
Review Comment:
neither newIoe nor ioe can be null at this line
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