[HBASE-27333] Abort RS when the hostname is different from master seen

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha-3, 2.5.3
• Fix Version/s: 2.6.0, 3.0.0-alpha-4
• Component/s: regionserver
• Assignee: Xiaolin Ha
• Reporter: Xiaolin Ha
• Created: 26/Aug/22 10:44
• Updated: 30/Mar/23 06:39
• Resolved: 29/Mar/23 07:02

Description

For HRegionServer#handleReportForDutyResponse, when the hostname is different from the regionserver and master side, both the two conditions should abort RS.

if (
  !StringUtils.isBlank(useThisHostnameInstead)
    && !hostnameFromMasterPOV.equals(useThisHostnameInstead)
) {
  String msg = "Master passed us a different hostname to use; was="
    + this.useThisHostnameInstead + ", but now=" + hostnameFromMasterPOV;
  LOG.error(msg);
  throw new IOException(msg);
}
if (
  StringUtils.isBlank(useThisHostnameInstead)
    && !hostnameFromMasterPOV.equals(rpcServices.getSocketAddress().getHostName())
) {
  String msg = "Master passed us a different hostname to use; was="
    + rpcServices.getSocketAddress().getHostName() + ", but now=" + hostnameFromMasterPOV;
  LOG.error(msg);
} 

Issue Links

• links to: GitHub Pull Request #4732
• links to: GitHub Pull Request #5148