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Posted to common-issues@hadoop.apache.org by "Hadoop QA (JIRA)" <ji...@apache.org> on 2012/07/23 21:30:34 UTC
[jira] [Commented] (HADOOP-8614) IOUtils#skipFully hangs forever on
EOF
[ https://issues.apache.org/jira/browse/HADOOP-8614?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13420896#comment-13420896 ]
Hadoop QA commented on HADOOP-8614:
-----------------------------------
-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12537591/HADOOP-8614.001.patch
against trunk revision .
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 1 new or modified test files.
+1 javac. The applied patch does not increase the total number of javac compiler warnings.
+1 javadoc. The javadoc tool did not generate any warning messages.
+1 eclipse:eclipse. The patch built with eclipse:eclipse.
+1 findbugs. The patch does not introduce any new Findbugs (version 1.3.9) warnings.
+1 release audit. The applied patch does not increase the total number of release audit warnings.
-1 core tests. The patch failed these unit tests in hadoop-common-project/hadoop-common:
org.apache.hadoop.ha.TestZKFailoverController
+1 contrib tests. The patch passed contrib unit tests.
Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/1210//testReport/
Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/1210//console
This message is automatically generated.
> IOUtils#skipFully hangs forever on EOF
> --------------------------------------
>
> Key: HADOOP-8614
> URL: https://issues.apache.org/jira/browse/HADOOP-8614
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 2.0.1-alpha
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Attachments: HADOOP-8614.001.patch
>
>
> IOUtils#skipFully contains this code:
> {code}
> public static void skipFully(InputStream in, long len) throws IOException {
> while (len > 0) {
> long ret = in.skip(len);
> if (ret < 0) {
> throw new IOException( "Premature EOF from inputStream");
> }
> len -= ret;
> }
> }
> {code}
> The Java documentation is silent about what exactly skip is supposed to do in the event of EOF. However, I looked at both InputStream#skip and ByteArrayInputStream#skip, and they both simply return 0 on EOF (no exception). So it seems safe to assume that this is the standard Java way of doing things in an InputStream.
> Currently IOUtils#skipFully will loop forever if you ask it to skip past EOF!
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