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https://issues.apache.org/jira/browse/HADOOP-4616?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12649553#action_12649553
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dhruba borthakur commented on HADOOP-4616:
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This patch introduces a debug print into stderr in libhdfs:
+ if (noReadBytes == 0 || noReadBytes < -1) {
+ fprintf(stderr, "WARN: FSDataInputStream.read returned invalid
return code - libhdfs returning EOF, i.e., 0: %d\n", noReadBytes);
+ }
I am fine with it but would like to poll the user-community to see if this
could break any application that is currently using libhdfs.
> assertion makes fuse-dfs exit when reading incomplete data
> ----------------------------------------------------------
>
> Key: HADOOP-4616
> URL: https://issues.apache.org/jira/browse/HADOOP-4616
> Project: Hadoop Core
> Issue Type: Bug
> Components: contrib/fuse-dfs
> Affects Versions: 0.18.2
> Reporter: Marc-Olivier Fleury
> Assignee: Pete Wyckoff
> Priority: Blocker
> Fix For: 0.18.3, 0.19.1, 0.20.0
>
> Attachments: HADOOP-4616.txt, HADOOP-4616.txt, HADOOP-4616.txt,
> HADOOP-4616_0.18.2.txt, HADOOP-4616_0.18.2.txt, HADOOP-4616_0.19.txt,
> HADOOP-4616_0.19.txt
>
>
> When trying to read a file that is corrupt on HDFS (registered by the
> namenode, but part of the data is missing on the datanodes), some of the
> assertions in dfs_read fail, causing the program to abort. This makes it
> impossible to access the mounted partition until it is mounted again.
> A simple way to reproduce this bug is to remove enough datanodes to have part
> of the data missing, and to read each file listed in HDFS.
> this is the assertion that fails (fuse_dfs.c:903) : assert(bufferReadIndex >=
> 0 && bufferReadIndex < fh->bufferSize);
> The expected behaviour would be to return either no file or a corrupt file,
> but continue working afterward.
> removing the assertion seems to work for now, but a special behaviour is
> probably needed to handle this particular problem correctly.
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