http://git-wip-us.apache.org/repos/asf/hbase-site/blob/0b638133/devapidocs/src-html/org/apache/hadoop/hbase/master/replication/ReplicationPeerManager.html
----------------------------------------------------------------------
diff --git 
a/devapidocs/src-html/org/apache/hadoop/hbase/master/replication/ReplicationPeerManager.html
 
b/devapidocs/src-html/org/apache/hadoop/hbase/master/replication/ReplicationPeerManager.html
index 928cae1..0dbf815 100644
--- 
a/devapidocs/src-html/org/apache/hadoop/hbase/master/replication/ReplicationPeerManager.html
+++ 
b/devapidocs/src-html/org/apache/hadoop/hbase/master/replication/ReplicationPeerManager.html
@@ -140,216 +140,226 @@
 <span class="sourceLineNo">132</span>    checkPeerConfig(peerConfig);<a 
name="line.132"></a>
 <span class="sourceLineNo">133</span>    ReplicationPeerDescription desc = 
checkPeerExists(peerId);<a name="line.133"></a>
 <span class="sourceLineNo">134</span>    ReplicationPeerConfig oldPeerConfig = 
desc.getPeerConfig();<a name="line.134"></a>
-<span class="sourceLineNo">135</span>    if 
(!StringUtils.isBlank(peerConfig.getClusterKey()) &amp;&amp;<a 
name="line.135"></a>
-<span class="sourceLineNo">136</span>      
!peerConfig.getClusterKey().equals(oldPeerConfig.getClusterKey())) {<a 
name="line.136"></a>
-<span class="sourceLineNo">137</span>      throw new DoNotRetryIOException(<a 
name="line.137"></a>
-<span class="sourceLineNo">138</span>          "Changing the cluster key on an 
existing peer is not allowed. Existing key '" +<a name="line.138"></a>
-<span class="sourceLineNo">139</span>            oldPeerConfig.getClusterKey() 
+ "' for peer " + peerId + " does not match new key '" +<a name="line.139"></a>
-<span class="sourceLineNo">140</span>            peerConfig.getClusterKey() + 
"'");<a name="line.140"></a>
-<span class="sourceLineNo">141</span>    }<a name="line.141"></a>
-<span class="sourceLineNo">142</span><a name="line.142"></a>
-<span class="sourceLineNo">143</span>    if 
(!StringUtils.isBlank(peerConfig.getReplicationEndpointImpl()) &amp;&amp;<a 
name="line.143"></a>
-<span class="sourceLineNo">144</span>      
!peerConfig.getReplicationEndpointImpl().equals(oldPeerConfig.getReplicationEndpointImpl()))
 {<a name="line.144"></a>
-<span class="sourceLineNo">145</span>      throw new 
DoNotRetryIOException("Changing the replication endpoint implementation class " 
+<a name="line.145"></a>
-<span class="sourceLineNo">146</span>        "on an existing peer is not 
allowed. Existing class '" +<a name="line.146"></a>
-<span class="sourceLineNo">147</span>        
oldPeerConfig.getReplicationEndpointImpl() + "' for peer " + peerId +<a 
name="line.147"></a>
-<span class="sourceLineNo">148</span>        " does not match new class '" + 
peerConfig.getReplicationEndpointImpl() + "'");<a name="line.148"></a>
-<span class="sourceLineNo">149</span>    }<a name="line.149"></a>
-<span class="sourceLineNo">150</span>  }<a name="line.150"></a>
-<span class="sourceLineNo">151</span><a name="line.151"></a>
-<span class="sourceLineNo">152</span>  public void addPeer(String peerId, 
ReplicationPeerConfig peerConfig, boolean enabled)<a name="line.152"></a>
-<span class="sourceLineNo">153</span>      throws ReplicationException {<a 
name="line.153"></a>
-<span class="sourceLineNo">154</span>    if (peers.containsKey(peerId)) {<a 
name="line.154"></a>
-<span class="sourceLineNo">155</span>      // this should be a retry, just 
return<a name="line.155"></a>
-<span class="sourceLineNo">156</span>      return;<a name="line.156"></a>
-<span class="sourceLineNo">157</span>    }<a name="line.157"></a>
-<span class="sourceLineNo">158</span>    ReplicationPeerConfig 
copiedPeerConfig = ReplicationPeerConfig.newBuilder(peerConfig).build();<a 
name="line.158"></a>
-<span class="sourceLineNo">159</span>    peerStorage.addPeer(peerId, 
copiedPeerConfig, enabled);<a name="line.159"></a>
-<span class="sourceLineNo">160</span>    peers.put(peerId, new 
ReplicationPeerDescription(peerId, enabled, copiedPeerConfig));<a 
name="line.160"></a>
-<span class="sourceLineNo">161</span>  }<a name="line.161"></a>
-<span class="sourceLineNo">162</span><a name="line.162"></a>
-<span class="sourceLineNo">163</span>  public void removePeer(String peerId) 
throws ReplicationException {<a name="line.163"></a>
-<span class="sourceLineNo">164</span>    if (!peers.containsKey(peerId)) {<a 
name="line.164"></a>
-<span class="sourceLineNo">165</span>      // this should be a retry, just 
return<a name="line.165"></a>
-<span class="sourceLineNo">166</span>      return;<a name="line.166"></a>
-<span class="sourceLineNo">167</span>    }<a name="line.167"></a>
-<span class="sourceLineNo">168</span>    peerStorage.removePeer(peerId);<a 
name="line.168"></a>
-<span class="sourceLineNo">169</span>    peers.remove(peerId);<a 
name="line.169"></a>
-<span class="sourceLineNo">170</span>  }<a name="line.170"></a>
-<span class="sourceLineNo">171</span><a name="line.171"></a>
-<span class="sourceLineNo">172</span>  private void setPeerState(String 
peerId, boolean enabled) throws ReplicationException {<a name="line.172"></a>
-<span class="sourceLineNo">173</span>    ReplicationPeerDescription desc = 
peers.get(peerId);<a name="line.173"></a>
-<span class="sourceLineNo">174</span>    if (desc.isEnabled() == enabled) {<a 
name="line.174"></a>
-<span class="sourceLineNo">175</span>      // this should be a retry, just 
return<a name="line.175"></a>
-<span class="sourceLineNo">176</span>      return;<a name="line.176"></a>
-<span class="sourceLineNo">177</span>    }<a name="line.177"></a>
-<span class="sourceLineNo">178</span>    peerStorage.setPeerState(peerId, 
enabled);<a name="line.178"></a>
-<span class="sourceLineNo">179</span>    peers.put(peerId, new 
ReplicationPeerDescription(peerId, enabled, desc.getPeerConfig()));<a 
name="line.179"></a>
-<span class="sourceLineNo">180</span>  }<a name="line.180"></a>
-<span class="sourceLineNo">181</span><a name="line.181"></a>
-<span class="sourceLineNo">182</span>  public void enablePeer(String peerId) 
throws ReplicationException {<a name="line.182"></a>
-<span class="sourceLineNo">183</span>    setPeerState(peerId, true);<a 
name="line.183"></a>
-<span class="sourceLineNo">184</span>  }<a name="line.184"></a>
-<span class="sourceLineNo">185</span><a name="line.185"></a>
-<span class="sourceLineNo">186</span>  public void disablePeer(String peerId) 
throws ReplicationException {<a name="line.186"></a>
-<span class="sourceLineNo">187</span>    setPeerState(peerId, false);<a 
name="line.187"></a>
-<span class="sourceLineNo">188</span>  }<a name="line.188"></a>
-<span class="sourceLineNo">189</span><a name="line.189"></a>
-<span class="sourceLineNo">190</span>  public void updatePeerConfig(String 
peerId, ReplicationPeerConfig peerConfig)<a name="line.190"></a>
-<span class="sourceLineNo">191</span>      throws ReplicationException {<a 
name="line.191"></a>
-<span class="sourceLineNo">192</span>    // the checking rules are too 
complicated here so we give up checking whether this is a retry.<a 
name="line.192"></a>
-<span class="sourceLineNo">193</span>    ReplicationPeerDescription desc = 
peers.get(peerId);<a name="line.193"></a>
-<span class="sourceLineNo">194</span>    ReplicationPeerConfig oldPeerConfig = 
desc.getPeerConfig();<a name="line.194"></a>
-<span class="sourceLineNo">195</span>    ReplicationPeerConfigBuilder 
newPeerConfigBuilder =<a name="line.195"></a>
-<span class="sourceLineNo">196</span>        
ReplicationPeerConfig.newBuilder(peerConfig);<a name="line.196"></a>
-<span class="sourceLineNo">197</span>    // we need to use the new conf to 
overwrite the old one.<a name="line.197"></a>
-<span class="sourceLineNo">198</span>    
newPeerConfigBuilder.putAllConfiguration(oldPeerConfig.getConfiguration());<a 
name="line.198"></a>
-<span class="sourceLineNo">199</span>    
newPeerConfigBuilder.putAllConfiguration(peerConfig.getConfiguration());<a 
name="line.199"></a>
-<span class="sourceLineNo">200</span>    
newPeerConfigBuilder.putAllConfiguration(oldPeerConfig.getConfiguration());<a 
name="line.200"></a>
-<span class="sourceLineNo">201</span>    
newPeerConfigBuilder.putAllConfiguration(peerConfig.getConfiguration());<a 
name="line.201"></a>
-<span class="sourceLineNo">202</span>    ReplicationPeerConfig newPeerConfig = 
newPeerConfigBuilder.build();<a name="line.202"></a>
-<span class="sourceLineNo">203</span>    peerStorage.updatePeerConfig(peerId, 
newPeerConfig);<a name="line.203"></a>
-<span class="sourceLineNo">204</span>    peers.put(peerId, new 
ReplicationPeerDescription(peerId, desc.isEnabled(), newPeerConfig));<a 
name="line.204"></a>
-<span class="sourceLineNo">205</span>  }<a name="line.205"></a>
-<span class="sourceLineNo">206</span><a name="line.206"></a>
-<span class="sourceLineNo">207</span>  public 
List&lt;ReplicationPeerDescription&gt; listPeers(Pattern pattern) {<a 
name="line.207"></a>
-<span class="sourceLineNo">208</span>    if (pattern == null) {<a 
name="line.208"></a>
-<span class="sourceLineNo">209</span>      return new 
ArrayList&lt;&gt;(peers.values());<a name="line.209"></a>
-<span class="sourceLineNo">210</span>    }<a name="line.210"></a>
-<span class="sourceLineNo">211</span>    return 
peers.values().stream().filter(r -&gt; 
pattern.matcher(r.getPeerId()).matches())<a name="line.211"></a>
-<span class="sourceLineNo">212</span>        .collect(Collectors.toList());<a 
name="line.212"></a>
-<span class="sourceLineNo">213</span>  }<a name="line.213"></a>
-<span class="sourceLineNo">214</span><a name="line.214"></a>
-<span class="sourceLineNo">215</span>  public 
Optional&lt;ReplicationPeerConfig&gt; getPeerConfig(String peerId) {<a 
name="line.215"></a>
-<span class="sourceLineNo">216</span>    ReplicationPeerDescription desc = 
peers.get(peerId);<a name="line.216"></a>
-<span class="sourceLineNo">217</span>    return desc != null ? 
Optional.of(desc.getPeerConfig()) : Optional.empty();<a name="line.217"></a>
-<span class="sourceLineNo">218</span>  }<a name="line.218"></a>
-<span class="sourceLineNo">219</span><a name="line.219"></a>
-<span class="sourceLineNo">220</span>  public void 
removeAllQueuesAndHFileRefs(String peerId) throws ReplicationException {<a 
name="line.220"></a>
-<span class="sourceLineNo">221</span>    // Here we need two passes to address 
the problem of claimQueue. Maybe a claimQueue is still<a name="line.221"></a>
-<span class="sourceLineNo">222</span>    // on-going when the refresh peer 
config procedure is done, if a RS which has already been<a name="line.222"></a>
-<span class="sourceLineNo">223</span>    // scanned claims the queue of a RS 
which has not been scanned yet, we will miss that queue in<a 
name="line.223"></a>
-<span class="sourceLineNo">224</span>    // the scan here, and if the RS who 
has claimed the queue crashed before creating recovered<a name="line.224"></a>
-<span class="sourceLineNo">225</span>    // source, then the queue will leave 
there until the another RS detects the crash and helps<a name="line.225"></a>
-<span class="sourceLineNo">226</span>    // removing the queue.<a 
name="line.226"></a>
-<span class="sourceLineNo">227</span>    // A two pass scan can solve the 
problem. Anyway, the queue will not disappear during the<a name="line.227"></a>
-<span class="sourceLineNo">228</span>    // claiming, it will either under the 
old RS or under the new RS, and a queue can only be<a name="line.228"></a>
-<span class="sourceLineNo">229</span>    // claimed once after the refresh 
peer procedure done(as the next claim queue will just delete<a 
name="line.229"></a>
-<span class="sourceLineNo">230</span>    // it), so we can make sure that a 
two pass scan will finally find the queue and remove it,<a name="line.230"></a>
-<span class="sourceLineNo">231</span>    // unless it has already been removed 
by others.<a name="line.231"></a>
+<span class="sourceLineNo">135</span>    if 
(!isStringEquals(peerConfig.getClusterKey(), oldPeerConfig.getClusterKey())) 
{<a name="line.135"></a>
+<span class="sourceLineNo">136</span>      throw new DoNotRetryIOException(<a 
name="line.136"></a>
+<span class="sourceLineNo">137</span>          "Changing the cluster key on an 
existing peer is not allowed. Existing key '" +<a name="line.137"></a>
+<span class="sourceLineNo">138</span>              
oldPeerConfig.getClusterKey() + "' for peer " + peerId + " does not match new 
key '" +<a name="line.138"></a>
+<span class="sourceLineNo">139</span>              peerConfig.getClusterKey() 
+ "'");<a name="line.139"></a>
+<span class="sourceLineNo">140</span>    }<a name="line.140"></a>
+<span class="sourceLineNo">141</span><a name="line.141"></a>
+<span class="sourceLineNo">142</span>    if 
(!isStringEquals(peerConfig.getReplicationEndpointImpl(),<a name="line.142"></a>
+<span class="sourceLineNo">143</span>      
oldPeerConfig.getReplicationEndpointImpl())) {<a name="line.143"></a>
+<span class="sourceLineNo">144</span>      throw new 
DoNotRetryIOException("Changing the replication endpoint implementation class " 
+<a name="line.144"></a>
+<span class="sourceLineNo">145</span>          "on an existing peer is not 
allowed. Existing class '" +<a name="line.145"></a>
+<span class="sourceLineNo">146</span>          
oldPeerConfig.getReplicationEndpointImpl() + "' for peer " + peerId +<a 
name="line.146"></a>
+<span class="sourceLineNo">147</span>          " does not match new class '" + 
peerConfig.getReplicationEndpointImpl() + "'");<a name="line.147"></a>
+<span class="sourceLineNo">148</span>    }<a name="line.148"></a>
+<span class="sourceLineNo">149</span>  }<a name="line.149"></a>
+<span class="sourceLineNo">150</span><a name="line.150"></a>
+<span class="sourceLineNo">151</span>  public void addPeer(String peerId, 
ReplicationPeerConfig peerConfig, boolean enabled)<a name="line.151"></a>
+<span class="sourceLineNo">152</span>      throws ReplicationException {<a 
name="line.152"></a>
+<span class="sourceLineNo">153</span>    if (peers.containsKey(peerId)) {<a 
name="line.153"></a>
+<span class="sourceLineNo">154</span>      // this should be a retry, just 
return<a name="line.154"></a>
+<span class="sourceLineNo">155</span>      return;<a name="line.155"></a>
+<span class="sourceLineNo">156</span>    }<a name="line.156"></a>
+<span class="sourceLineNo">157</span>    ReplicationPeerConfig 
copiedPeerConfig = ReplicationPeerConfig.newBuilder(peerConfig).build();<a 
name="line.157"></a>
+<span class="sourceLineNo">158</span>    peerStorage.addPeer(peerId, 
copiedPeerConfig, enabled);<a name="line.158"></a>
+<span class="sourceLineNo">159</span>    peers.put(peerId, new 
ReplicationPeerDescription(peerId, enabled, copiedPeerConfig));<a 
name="line.159"></a>
+<span class="sourceLineNo">160</span>  }<a name="line.160"></a>
+<span class="sourceLineNo">161</span><a name="line.161"></a>
+<span class="sourceLineNo">162</span>  public void removePeer(String peerId) 
throws ReplicationException {<a name="line.162"></a>
+<span class="sourceLineNo">163</span>    if (!peers.containsKey(peerId)) {<a 
name="line.163"></a>
+<span class="sourceLineNo">164</span>      // this should be a retry, just 
return<a name="line.164"></a>
+<span class="sourceLineNo">165</span>      return;<a name="line.165"></a>
+<span class="sourceLineNo">166</span>    }<a name="line.166"></a>
+<span class="sourceLineNo">167</span>    peerStorage.removePeer(peerId);<a 
name="line.167"></a>
+<span class="sourceLineNo">168</span>    peers.remove(peerId);<a 
name="line.168"></a>
+<span class="sourceLineNo">169</span>  }<a name="line.169"></a>
+<span class="sourceLineNo">170</span><a name="line.170"></a>
+<span class="sourceLineNo">171</span>  private void setPeerState(String 
peerId, boolean enabled) throws ReplicationException {<a name="line.171"></a>
+<span class="sourceLineNo">172</span>    ReplicationPeerDescription desc = 
peers.get(peerId);<a name="line.172"></a>
+<span class="sourceLineNo">173</span>    if (desc.isEnabled() == enabled) {<a 
name="line.173"></a>
+<span class="sourceLineNo">174</span>      // this should be a retry, just 
return<a name="line.174"></a>
+<span class="sourceLineNo">175</span>      return;<a name="line.175"></a>
+<span class="sourceLineNo">176</span>    }<a name="line.176"></a>
+<span class="sourceLineNo">177</span>    peerStorage.setPeerState(peerId, 
enabled);<a name="line.177"></a>
+<span class="sourceLineNo">178</span>    peers.put(peerId, new 
ReplicationPeerDescription(peerId, enabled, desc.getPeerConfig()));<a 
name="line.178"></a>
+<span class="sourceLineNo">179</span>  }<a name="line.179"></a>
+<span class="sourceLineNo">180</span><a name="line.180"></a>
+<span class="sourceLineNo">181</span>  public void enablePeer(String peerId) 
throws ReplicationException {<a name="line.181"></a>
+<span class="sourceLineNo">182</span>    setPeerState(peerId, true);<a 
name="line.182"></a>
+<span class="sourceLineNo">183</span>  }<a name="line.183"></a>
+<span class="sourceLineNo">184</span><a name="line.184"></a>
+<span class="sourceLineNo">185</span>  public void disablePeer(String peerId) 
throws ReplicationException {<a name="line.185"></a>
+<span class="sourceLineNo">186</span>    setPeerState(peerId, false);<a 
name="line.186"></a>
+<span class="sourceLineNo">187</span>  }<a name="line.187"></a>
+<span class="sourceLineNo">188</span><a name="line.188"></a>
+<span class="sourceLineNo">189</span>  public void updatePeerConfig(String 
peerId, ReplicationPeerConfig peerConfig)<a name="line.189"></a>
+<span class="sourceLineNo">190</span>      throws ReplicationException {<a 
name="line.190"></a>
+<span class="sourceLineNo">191</span>    // the checking rules are too 
complicated here so we give up checking whether this is a retry.<a 
name="line.191"></a>
+<span class="sourceLineNo">192</span>    ReplicationPeerDescription desc = 
peers.get(peerId);<a name="line.192"></a>
+<span class="sourceLineNo">193</span>    ReplicationPeerConfig oldPeerConfig = 
desc.getPeerConfig();<a name="line.193"></a>
+<span class="sourceLineNo">194</span>    ReplicationPeerConfigBuilder 
newPeerConfigBuilder =<a name="line.194"></a>
+<span class="sourceLineNo">195</span>        
ReplicationPeerConfig.newBuilder(peerConfig);<a name="line.195"></a>
+<span class="sourceLineNo">196</span>    // we need to use the new conf to 
overwrite the old one.<a name="line.196"></a>
+<span class="sourceLineNo">197</span>    
newPeerConfigBuilder.putAllConfiguration(oldPeerConfig.getConfiguration());<a 
name="line.197"></a>
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newPeerConfigBuilder.putAllConfiguration(peerConfig.getConfiguration());<a 
name="line.198"></a>
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newPeerConfigBuilder.putAllConfiguration(oldPeerConfig.getConfiguration());<a 
name="line.199"></a>
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newPeerConfigBuilder.putAllConfiguration(peerConfig.getConfiguration());<a 
name="line.200"></a>
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newPeerConfigBuilder.build();<a name="line.201"></a>
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newPeerConfig);<a name="line.202"></a>
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ReplicationPeerDescription(peerId, desc.isEnabled(), newPeerConfig));<a 
name="line.203"></a>
+<span class="sourceLineNo">204</span>  }<a name="line.204"></a>
+<span class="sourceLineNo">205</span><a name="line.205"></a>
+<span class="sourceLineNo">206</span>  public 
List&lt;ReplicationPeerDescription&gt; listPeers(Pattern pattern) {<a 
name="line.206"></a>
+<span class="sourceLineNo">207</span>    if (pattern == null) {<a 
name="line.207"></a>
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ArrayList&lt;&gt;(peers.values());<a name="line.208"></a>
+<span class="sourceLineNo">209</span>    }<a name="line.209"></a>
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peers.values().stream().filter(r -&gt; 
pattern.matcher(r.getPeerId()).matches())<a name="line.210"></a>
+<span class="sourceLineNo">211</span>        .collect(Collectors.toList());<a 
name="line.211"></a>
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Optional&lt;ReplicationPeerConfig&gt; getPeerConfig(String peerId) {<a 
name="line.214"></a>
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peers.get(peerId);<a name="line.215"></a>
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Optional.of(desc.getPeerConfig()) : Optional.empty();<a name="line.216"></a>
+<span class="sourceLineNo">217</span>  }<a name="line.217"></a>
+<span class="sourceLineNo">218</span><a name="line.218"></a>
+<span class="sourceLineNo">219</span>  public void 
removeAllQueuesAndHFileRefs(String peerId) throws ReplicationException {<a 
name="line.219"></a>
+<span class="sourceLineNo">220</span>    // Here we need two passes to address 
the problem of claimQueue. Maybe a claimQueue is still<a name="line.220"></a>
+<span class="sourceLineNo">221</span>    // on-going when the refresh peer 
config procedure is done, if a RS which has already been<a name="line.221"></a>
+<span class="sourceLineNo">222</span>    // scanned claims the queue of a RS 
which has not been scanned yet, we will miss that queue in<a 
name="line.222"></a>
+<span class="sourceLineNo">223</span>    // the scan here, and if the RS who 
has claimed the queue crashed before creating recovered<a name="line.223"></a>
+<span class="sourceLineNo">224</span>    // source, then the queue will leave 
there until the another RS detects the crash and helps<a name="line.224"></a>
+<span class="sourceLineNo">225</span>    // removing the queue.<a 
name="line.225"></a>
+<span class="sourceLineNo">226</span>    // A two pass scan can solve the 
problem. Anyway, the queue will not disappear during the<a name="line.226"></a>
+<span class="sourceLineNo">227</span>    // claiming, it will either under the 
old RS or under the new RS, and a queue can only be<a name="line.227"></a>
+<span class="sourceLineNo">228</span>    // claimed once after the refresh 
peer procedure done(as the next claim queue will just delete<a 
name="line.228"></a>
+<span class="sourceLineNo">229</span>    // it), so we can make sure that a 
two pass scan will finally find the queue and remove it,<a name="line.229"></a>
+<span class="sourceLineNo">230</span>    // unless it has already been removed 
by others.<a name="line.230"></a>
+<span class="sourceLineNo">231</span>    
ReplicationUtils.removeAllQueues(queueStorage, peerId);<a name="line.231"></a>
 <span class="sourceLineNo">232</span>    
ReplicationUtils.removeAllQueues(queueStorage, peerId);<a name="line.232"></a>
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ReplicationUtils.removeAllQueues(queueStorage, peerId);<a name="line.233"></a>
-<span class="sourceLineNo">234</span>    
queueStorage.removePeerFromHFileRefs(peerId);<a name="line.234"></a>
-<span class="sourceLineNo">235</span>  }<a name="line.235"></a>
-<span class="sourceLineNo">236</span><a name="line.236"></a>
-<span class="sourceLineNo">237</span>  private void 
checkPeerConfig(ReplicationPeerConfig peerConfig) throws DoNotRetryIOException 
{<a name="line.237"></a>
-<span class="sourceLineNo">238</span>    
checkClusterKey(peerConfig.getClusterKey());<a name="line.238"></a>
-<span class="sourceLineNo">239</span><a name="line.239"></a>
-<span class="sourceLineNo">240</span>    if 
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+<span class="sourceLineNo">341</span>        
ReplicationStorageFactory.getReplicationQueueStorage(zk, conf), peers);<a 
name="line.341"></a>
+<span class="sourceLineNo">342</span>  }<a name="line.342"></a>
+<span class="sourceLineNo">343</span><a name="line.343"></a>
+<span class="sourceLineNo">344</span>  /**<a name="line.344"></a>
+<span class="sourceLineNo">345</span>   * For replication peer cluster key or 
endpoint class, null and empty string is same. So here<a name="line.345"></a>
+<span class="sourceLineNo">346</span>   * don't use {@link 
StringUtils#equals(CharSequence, CharSequence)} directly.<a name="line.346"></a>
+<span class="sourceLineNo">347</span>   */<a name="line.347"></a>
+<span class="sourceLineNo">348</span>  private boolean isStringEquals(String 
s1, String s2) {<a name="line.348"></a>
+<span class="sourceLineNo">349</span>    if (StringUtils.isBlank(s1)) {<a 
name="line.349"></a>
+<span class="sourceLineNo">350</span>      return StringUtils.isBlank(s2);<a 
name="line.350"></a>
+<span class="sourceLineNo">351</span>    }<a name="line.351"></a>
+<span class="sourceLineNo">352</span>    return s1.equals(s2);<a 
name="line.352"></a>
+<span class="sourceLineNo">353</span>  }<a name="line.353"></a>
+<span class="sourceLineNo">354</span>}<a name="line.354"></a>
 
 
 

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