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https://issues.apache.org/jira/browse/HDFS-10543?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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James Clampffer updated HDFS-10543:
-----------------------------------
Status: Patch Available (was: Open)
Marking as patch available to get CI running, had to assign to myself to make
that happen.
> hdfsRead read stops at block boundary
> -------------------------------------
>
> Key: HDFS-10543
> URL: https://issues.apache.org/jira/browse/HDFS-10543
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: hdfs-client
> Reporter: Xiaowei Zhu
> Assignee: James Clampffer
> Attachments: HDFS-10543.HDFS-8707.000.patch,
> HDFS-10543.HDFS-8707.001.patch
>
>
> Reproducer:
> char *buf2 = new char[file_info->mSize];
> memset(buf2, 0, (size_t)file_info->mSize);
> int ret = hdfsRead(fs, file, buf2, file_info->mSize);
> delete [] buf2;
> if(ret != file_info->mSize) {
> std::stringstream ss;
> ss << "tried to read " << file_info->mSize << " bytes. but read " <<
> ret << " bytes";
> ReportError(ss.str());
> hdfsCloseFile(fs, file);
> continue;
> }
> When it runs with a file ~1.4GB large, it will return an error like "tried to
> read 1468888890 bytes. but read 134217728 bytes". The HDFS cluster it runs
> against has a block size of 134217728 bytes. So it seems hdfsRead will stop
> at a block boundary. Looks like a regression. We should add retry to continue
> reading cross blocks in case of files w/ multiple blocks.
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