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From "ChiaPing Tsai (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-17344) The regionserver web UIs miss the coprocessors of RegionServerCoprocessorHost.
Date Tue, 20 Dec 2016 09:17:58 GMT
ChiaPing Tsai created HBASE-17344:
-------------------------------------

             Summary: The regionserver web UIs miss the coprocessors of RegionServerCoprocessorHost.
                 Key: HBASE-17344
                 URL: https://issues.apache.org/jira/browse/HBASE-17344
             Project: HBase
          Issue Type: Bug
            Reporter: ChiaPing Tsai
            Priority: Minor


The critical code is shown below.
{code:title=HRegionServer.java|borderStyle=solid}
  public String[] getRegionServerCoprocessors() {
    TreeSet<String> coprocessors = new TreeSet<String>();
    try {
      coprocessors.addAll(getWAL(null).getCoprocessorHost().getCoprocessors());
    } catch (IOException exception) {
      LOG.warn("Exception attempting to fetch wal coprocessor information for the common wal;
" +
          "skipping.");
      LOG.debug("Exception details for failure to fetch wal coprocessor information.", exception);
    }
    Collection<Region> regions = getOnlineRegionsLocalContext();
    for (Region region: regions) {
      coprocessors.addAll(region.getCoprocessorHost().getCoprocessors());
      try {
        coprocessors.addAll(getWAL(region.getRegionInfo()).getCoprocessorHost().getCoprocessors());
      } catch (IOException exception) {
        LOG.warn("Exception attempting to fetch wal coprocessor information for region " +
region +
            "; skipping.");
        LOG.debug("Exception details for failure to fetch wal coprocessor information.", exception);
      }
    }
    return coprocessors.toArray(new String[coprocessors.size()]);
  }
{code}

A case is that the the JMXListener always disappears on the rs web.



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