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https://issues.apache.org/jira/browse/TS-4804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15455845#comment-15455845
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Oknet Xu commented on TS-4804:
------------------------------
[~zwoop] the bug only in 7.0.0.
> Incorrect write.vio.ndone
> -------------------------
>
> Key: TS-4804
> URL: https://issues.apache.org/jira/browse/TS-4804
> Project: Traffic Server
> Issue Type: Bug
> Components: Core
> Reporter: Oknet Xu
> Assignee: Oknet Xu
> Fix For: 7.0.0
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> {code}
> int64_t
> UnixNetVConnection::load_buffer_and_write(int64_t towrite, MIOBufferAccessor
> &buf, int64_t &total_written, int &needs)
> {
> ...
> if (r > 0) {
> buf.reader()->consume(r);
> }
> total_written += r;
> ...
> return r;
> }
> {code}
> the 'r' is returned from socketManage.writev().
> 'total_written += r;' should be enclosed by if statement because the 'r' may
> be a negative value otherwise the total_written is incorrect.
> {code}
> void
> write_to_net_io(NetHandler *nh, UnixNetVConnection *vc, EThread *thread)
> {
> ...
> int64_t r = vc->load_buffer_and_write(towrite, buf,
> total_written, needs);
> if (total_written > 0) {
> NET_SUM_DYN_STAT(net_write_bytes_stat, total_written);
> s->vio.ndone += total_written;
> }
> ...
> }
> {code}
> The incorrect total_written will cause the incorrect of write.vio.ndone.
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