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https://issues.apache.org/jira/browse/FLUME-3101?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16073318#comment-16073318
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hunshenshi commented on FLUME-3101:
-----------------------------------
[~fszabo] Can you assign this task to me?
Could you also help review the patch in
[ReviewRequest_FLUME-3101|https://reviews.apache.org/r/59743/]? thanks
> taildir source may endless loop when tail a file
> ------------------------------------------------
>
> Key: FLUME-3101
> URL: https://issues.apache.org/jira/browse/FLUME-3101
> Project: Flume
> Issue Type: Bug
> Components: Sinks+Sources
> Affects Versions: 1.7.0
> Reporter: hunshenshi
> Labels: patch, taildirsource
> Fix For: 1.8.0
>
> Attachments: FLUME-3101-0.patch, FLUME-3101-1.patch,
> FLUME-3101-2.patch, FLUME-3101-3.patch
>
>
> If there are many files in the path that need to be tail, and there is a file
> written by *high frequency* (for example, there are file a, file b and file c
> in the path, file a is written at high frequency), *taildir can read the
> batchSize size event from file a everytime*, then taildir will only read data
> from file a, other files will not to be read, because in
> TaildirSource.tailFileProcess will into an endless loop.
> code:
> {code:title=TaildirSource.java|borderStyle=solid}
> private void tailFileProcess(TailFile tf, boolean backoffWithoutNL)
> throws IOException, InterruptedException {
> while (true) {
> // if events.size >= batchSize will not break while,
> // then into endless loop to only read tf
> if (events.size() < batchSize) {
> break;
> }
> }
> }
> {code}
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