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From "BELUGA BEHR (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-9507) LeaseRenewer Logging Under-Reporting
Date Fri, 04 Dec 2015 18:57:11 GMT
BELUGA BEHR created HDFS-9507:
---------------------------------

             Summary: LeaseRenewer Logging Under-Reporting
                 Key: HDFS-9507
                 URL: https://issues.apache.org/jira/browse/HDFS-9507
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: namenode
    Affects Versions: 2.7.1
            Reporter: BELUGA BEHR
            Priority: Minor


Why is it that in LeaseRenewer#run() failures to renew a lease on a file are reported with
"warn" level logging, but in LeaseRenewer#renew() it is reported with a "debug" level warn?

In LeaseRenewer#renew(), if the method renewLease() returns 'false' then the problem is silently
discarded (continue, no Exception is thrown) and the next client in the list tries to renew.

{code:title=LeaseRenewer.java|borderStyle=solid}
private void run(final int id) throws InterruptedException {
  ...
  try {
    renew();
    lastRenewed = Time.monotonicNow();
  } catch (SocketTimeoutException ie) {
    LOG.warn("Failed to renew lease for " + clientsString() + " for "
    + (elapsed/1000) + " seconds.  Aborting ...", ie);
    synchronized (this) {
      while (!dfsclients.isEmpty()) {
        DFSClient dfsClient = dfsclients.get(0);
        dfsClient.closeAllFilesBeingWritten(true);
        closeClient(dfsClient);
      }
      //Expire the current LeaseRenewer thread.
      emptyTime = 0;
    }
    break;
  } catch (IOException ie) {
    LOG.warn("Failed to renew lease for " + clientsString() + " for "
      + (elapsed/1000) + " seconds.  Will retry shortly ...", ie);
  }
}
...
}


private void renew() throws IOException {
{
   ...
        if (!c.renewLease()) {
          LOG.debug("Did not renew lease for client {}", c);
          continue;
        }
   ...
}
{code}



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