[jira] [Commented] (SOLR-7438) Look into using new HDFS truncate feature in HdfsTransactionLog.

["Mark Miller (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-7438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14505197#comment-14505197 ] 

Mark Miller commented on SOLR-7438:
-----------------------------------

HDFS-3107

> Look into using new HDFS truncate feature in HdfsTransactionLog.
> ----------------------------------------------------------------
>
>                 Key: SOLR-7438
>                 URL: https://issues.apache.org/jira/browse/SOLR-7438
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Mark Miller
>            Assignee: Mark Miller
>
> Looks like truncate is added in 2.7.
> See HdfsTransactionLog:
> {code}
>   // HACK
>   // while waiting for HDFS-3107, instead of quickly
>   // dropping, we slowly apply
>   // This is somewhat brittle, but current usage
>   // allows for it
>   @Override
>   public boolean dropBufferedUpdates() {
>     Future<RecoveryInfo> future = applyBufferedUpdates();
>     if (future != null) {
>       try {
>         future.get();
>       } catch (InterruptedException | ExecutionException e) {
>         throw new RuntimeException(e);
>       }
>     }
>     return true;
>   }
> {code}



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