szetszwo commented on code in PR #4276:
URL: https://github.com/apache/ozone/pull/4276#discussion_r1107681156
##########
hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/server/SCMClientProtocolServer.java:
##########
@@ -782,6 +795,89 @@ public ScmInfo getScmInfo() throws IOException {
}
}
+ @Override
+ public void transferLeadership(String newLeaderId)
+ throws IOException {
+ getScm().checkAdminAccess(getRemoteUser());
+ if (!SCMHAUtils.isSCMHAEnabled(getScm().getConfiguration())) {
+ throw new SCMException("SCM HA not enabled.",
ResultCodes.INTERNAL_ERROR);
+ }
+ boolean auditSuccess = true;
+ final Map<String, String> auditMap = Maps.newHashMap();
+ auditMap.put("newLeaderId", newLeaderId);
+ try {
+ SCMRatisServer scmRatisServer = scm.getScmHAManager().getRatisServer();
+ RaftGroup group = scmRatisServer.getDivision().getGroup();
+ RaftPeerId targetPeerId;
+ if (newLeaderId.isEmpty()) {
+ RaftPeer curLeader = ((SCMRatisServerImpl) scm.getScmHAManager()
+ .getRatisServer()).getLeader();
+ targetPeerId = group.getPeers()
+ .stream()
+ .filter(a -> !a.equals(curLeader)).findFirst()
+ .map(RaftPeer::getId)
+ .orElseThrow(() -> new IOException("Cannot" +
+ " find a new leader to transfer leadership."));
+ } else {
+ String ratisAddr = convertToRatisAddr(newLeaderId);
Review Comment:
Use `RaftPeerId.getRaftPeerId(newLeaderId)` to get `RaftPeerId`; see
https://github.com/apache/ozone/blob/master/hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/ha/SCMRatisServerImpl.java#L172
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