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https://issues.apache.org/jira/browse/HDFS-13994?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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BELUGA BEHR updated HDFS-13994:
-------------------------------
Status: Patch Available (was: Open)
Just posted another patch that has the _sleep_ instead of _yield_. Your choice
:)
> DataNode BlockSender waitForMinLength
> -------------------------------------
>
> Key: HDFS-13994
> URL: https://issues.apache.org/jira/browse/HDFS-13994
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Affects Versions: 3.2.0
> Reporter: BELUGA BEHR
> Assignee: BELUGA BEHR
> Priority: Minor
> Attachments: HDFS-13994.1.patch, HDFS-13994.2.patch,
> HDFS-13994.3.patch, HDFS-13994.4.patch, HDFS-13994.5.patch
>
>
> {code:java|title=BlockSender.java}
> private static void waitForMinLength(ReplicaInPipeline rbw, long len)
> throws IOException {
> // Wait for 3 seconds for rbw replica to reach the minimum length
> for (int i = 0; i < 30 && rbw.getBytesOnDisk() < len; i++) {
> try {
> Thread.sleep(100);
> } catch (InterruptedException ie) {
> throw new IOException(ie);
> }
> }
> long bytesOnDisk = rbw.getBytesOnDisk();
> if (bytesOnDisk < len) {
> throw new IOException(
> String.format("Need %d bytes, but only %d bytes available", len,
> bytesOnDisk));
> }
> }
> {code}
> It is not very efficient to poll for status in this way. Instead, use
> {{notifyAll}} within the {{ReplicaInPipeline}} to notify the caller when the
> replica has reached a certain size.
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