[ 
https://issues.apache.org/jira/browse/HBASE-19753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16321345#comment-16321345
 ] 

stack commented on HBASE-19753:
-------------------------------

Thanks for taking a look [~Apache9] Here is info.

Here is failure:

[INFO] -------------------------------------------------------
[INFO]  T E S T S
[INFO] -------------------------------------------------------
[INFO] Running org.apache.hadoop.hbase.zookeeper.TestReadOnlyZKClient
[ERROR] Tests run: 3, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 250.187 
s <<< FAILURE! - in org.apache.hadoop.hbase.zookeeper.TestReadOnlyZKClient
[ERROR] 
testSessionExpire(org.apache.hadoop.hbase.zookeeper.TestReadOnlyZKClient)  Time 
elapsed: 156.005 s  <<< ERROR!
java.util.concurrent.ExecutionException: 
org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = 
ConnectionLoss for /test
        at 
org.apache.hadoop.hbase.zookeeper.TestReadOnlyZKClient.testSessionExpire(TestReadOnlyZKClient.java:145)
Caused by: org.apache.zookeeper.KeeperException$ConnectionLossException: 
KeeperErrorCode = ConnectionLoss for /test


{code}
119 2018-01-10 15:22:41,604 INFO  [main] hbase.ResourceChecker(148): before: 
zookeeper.TestReadOnlyZKClient#testSessionExpire Thread=13, 
OpenFileDescriptor=112, MaxFileDescriptor=32000, SystemLoadAverage=67, 
ProcessCount=833, AvailableMemoryMB=12065
120 2018-01-10 15:22:41,605 INFO  [ReadOnlyZKClient] zookeeper.ZooKeeper(438): 
Initiating client connection, connectString=localhost:51573 
sessionTimeout=90000 
watcher=org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient$$Lambda$11/1499902826@57a14636
121 2018-01-10 15:22:41,607 INFO  
[ReadOnlyZKClient-SendThread(user-164-127-0-0.play-internet.pl:51573)] 
zookeeper.ClientCnxn$SendThread(1032): Opening socket connection to server 
user-164-127-0-0.play-internet.pl/164.127.0.0:51573. Will not attempt to 
authenticate using SASL (unknown error)
122 2018-01-10 15:22:44,606 INFO  [ReadOnlyZKClient] 
zookeeper.ReadOnlyZKClient(305): 0x57f23557 no activities for 3000 ms, close 
active connection. Will reconnect next time when there are new requests.
123 2018-01-10 15:22:44,606 DEBUG [ReadOnlyZKClient] zookeeper.ZooKeeper(673): 
Closing session: 0x0
124 2018-01-10 15:22:44,606 DEBUG [ReadOnlyZKClient] 
zookeeper.ClientCnxn(1370): Closing client for session: 0x0
125 2018-01-10 15:23:26,648 WARN  
[ReadOnlyZKClient-SendThread(user-164-127-0-0.play-internet.pl:51573)] 
zookeeper.ClientCnxn$SendThread(1108): Client session timed out, have not heard 
from server in 45043ms for sessionid 0x0
126 2018-01-10 15:23:26,648 DEBUG 
[ReadOnlyZKClient-SendThread(user-164-127-0-0.play-internet.pl:51573)] 
zookeeper.ClientCnxn$SendThread(1146): An exception was thrown while closing 
send thread for session 0x0 : Client session timed out, have not heard from 
server in 45043ms for sessionid 0x0
127 2018-01-10 15:23:26,649 DEBUG 
[ReadOnlyZKClient-SendThread(user-164-127-0-0.play-internet.pl:51573)] 
zookeeper.ClientCnxnSocketNIO(203): Ignoring exception during shutdown input
128 java.net.SocketException: Socket is not connected
129   at sun.nio.ch.Net.translateToSocketException(Net.java:123)
130   at sun.nio.ch.Net.translateException(Net.java:157)
131   at sun.nio.ch.Net.translateException(Net.java:163)
132   at sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:401)
133   at 
org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:200)
134   at 
org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1246)
135   at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1182)
136 Caused by: java.nio.channels.NotYetConnectedException
137   at sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:782)
138   at sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:399)
139   ... 3 more
140 2018-01-10 15:23:26,653 DEBUG 
[ReadOnlyZKClient-SendThread(user-164-127-0-0.play-internet.pl:51573)] 
zookeeper.ClientCnxnSocketNIO(210): Ignoring exception during shutdown output
141 java.net.SocketException: Socket is not connected
142   at sun.nio.ch.Net.translateToSocketException(Net.java:123)
143   at sun.nio.ch.Net.translateException(Net.java:157)
144   at sun.nio.ch.Net.translateException(Net.java:163)
145   at sun.nio.ch.SocketAdaptor.shutdownOutput(SocketAdaptor.java:409)
146   at 
org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:207)
147   at 
org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1246)
148   at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1182)
149 Caused by: java.nio.channels.NotYetConnectedException
150   at sun.nio.ch.SocketChannelImpl.shutdownOutput(SocketChannelImpl.java:799)
151   at sun.nio.ch.SocketAdaptor.shutdownOutput(SocketAdaptor.java:407)
152   ... 3 more
153 2018-01-10 15:23:26,754 DEBUG [ReadOnlyZKClient] 
zookeeper.ClientCnxn(1354): Disconnecting client for session: 0x0
154 2018-01-10 15:23:26,755 INFO  [ReadOnlyZKClient] zookeeper.ZooKeeper(684): 
Session: 0x0 closed
155 2018-01-10 15:23:26,755 INFO  [ReadOnlyZKClient-EventThread] 
zookeeper.ClientCnxn$EventThread(519): EventThread shut down for session: 0x0
156 2018-01-10 15:23:26,755 WARN  [ReadOnlyZKClient] 
zookeeper.ReadOnlyZKClient$ZKTask$1(178): 0x57f23557 failed for get of /test, 
code = CONNECTIONLOSS, retries = 1
157 2018-01-10 15:23:26,855 INFO  [ReadOnlyZKClient] zookeeper.ZooKeeper(438): 
Initiating client connection, connectString=localhost:51573 
sessionTimeout=90000 
watcher=org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient$$Lambda$11/1499902826@57a14636
158 2018-01-10 15:23:26,857 INFO  
[ReadOnlyZKClient-SendThread(localhost:51573)] 
zookeeper.ClientCnxn$SendThread(1032): Opening socket connection to server 
localhost/127.0.0.1:51573. Will not attempt to authenticate using SASL (unknown 
error)
159 2018-01-10 15:23:26,858 INFO  
[ReadOnlyZKClient-SendThread(localhost:51573)] 
zookeeper.ClientCnxn$SendThread(876): Socket connection established to 
localhost/127.0.0.1:51573, initiating session
160 2018-01-10 15:23:26,858 INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:51573] 
server.NIOServerCnxnFactory(192): Accepted socket connection from 
/127.0.0.1:34294
161 2018-01-10 15:23:26,858 DEBUG 
[ReadOnlyZKClient-SendThread(localhost:51573)] 
zookeeper.ClientCnxn$SendThread(949): Session establishment request sent on 
localhost/127.0.0.1:51573
162 2018-01-10 15:23:26,859 DEBUG [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:51573] 
server.ZooKeeperServer(884): Session establishment request from client 
/127.0.0.1:34294 client's lastZxid is 0x0
163 2018-01-10 15:23:26,859 INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:51573] 
server.ZooKeeperServer(942): Client attempting to establish new session at 
/127.0.0.1:34294
164 2018-01-10 15:23:26,860 DEBUG [SyncThread:0] 
server.FinalRequestProcessor(88): Processing request:: 
sessionid:0x160e261f37a0002 type:createSession cxid:0x0 zxid:0xb txntype:-10 
reqpath:n/a
165 2018-01-10 15:23:26,861 DEBUG [SyncThread:0] 
server.FinalRequestProcessor(160): sessionid:0x160e261f37a0002 
type:createSession cxid:0x0 zxid:0xb txntype:-10 reqpath:n/a
166 2018-01-10 15:23:26,862 INFO  [SyncThread:0] server.ZooKeeperServer(687): 
Established session 0x160e261f37a0002 with negotiated timeout 40000 for client 
/127.0.0.1:34294
167 2018-01-10 15:23:26,862 INFO  
[ReadOnlyZKClient-SendThread(localhost:51573)] 
zookeeper.ClientCnxn$SendThread(1299): Session establishment complete on server 
localhost/127.0.0.1:51573, sessionid = 0x160e261f37a0002, negotiated timeout = 
40000
168 2018-01-10 15:23:26,863 DEBUG [SyncThread:0] 
server.FinalRequestProcessor(88): Processing request:: 
sessionid:0x160e261f37a0002 type:getData cxid:0x1 zxid:0xfffffffffffffffe 
txntype:unknown reqpath:/test
169 2018-01-10 15:23:26,863 DEBUG [SyncThread:0] 
server.FinalRequestProcessor(160): sessionid:0x160e261f37a0002 type:getData 
cxid:0x1 zxid:0xfffffffffffffffe txntype:unknown reqpath:/test
170 2018-01-10 15:23:26,865 DEBUG 
[ReadOnlyZKClient-SendThread(localhost:51573)] 
zookeeper.ClientCnxn$SendThread(843): Reading reply 
sessionid:0x160e261f37a0002, packet:: clientPath:/test serverPath:/test 
finished:false header:: 1,4  replyHeader:: 1,11,0  request:: '/test,F  
response:: 
#ffffffc77867ffffffcbffffffa7ffffffd12dffffffa5ffffffb46f,s{2,2,1515626558454,15
2018-01-10 15:23:26,865 INFO  [main] server.ZooKeeperServer(337): Closing 
session 0x160e261f37a0002
172 2018-01-10 15:23:26,866 INFO  [ProcessThread(sid:0 cport:51573):] 
server.PrepRequestProcessor(486): Processed session termination for sessionid: 
0x160e261f37a0002
173 2018-01-10 15:23:26,866 DEBUG [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:51573] 
server.ZooKeeperServer(754): Dropping request: No session with sessionid 
0x160e261f37a0002 exists, probably expired and removed
174 2018-01-10 15:23:26,866 DEBUG [SyncThread:0] 
server.FinalRequestProcessor(88): Processing request:: 
sessionid:0x160e261f37a0002 type:closeSession cxid:0x0 zxid:0xc txntype:-11 
reqpath:n/a
175 2018-01-10 15:23:26,867 INFO  [SyncThread:0] server.NIOServerCnxn(1044): 
Closed socket connection for client /127.0.0.1:34294 which had sessionid 
0x160e261f37a0002
176 2018-01-10 15:23:26,868 INFO  
[ReadOnlyZKClient-SendThread(localhost:51573)] 
zookeeper.ClientCnxn$SendThread(1158): Unable to read additional data from 
server sessionid 0x160e261f37a0002, likely server has closed socket, closing 
socket connection and attempting reconnect
177 2018-01-10 15:23:26,968 WARN  [ReadOnlyZKClient] 
zookeeper.ReadOnlyZKClient$ZKTask$1(178): 0x57f23557 failed for get of /test, 
code = CONNECTIONLOSS, retries = 1
178 2018-01-10 15:23:27,190 INFO  
[ReadOnlyZKClient-SendThread(user-164-127-0-0.play-internet.pl:51573)] 
zookeeper.ClientCnxn$SendThread(1032): Opening socket connection to server 
user-164-127-0-0.play-internet.pl/164.127.0.0:51573. Will not attempt to 
authenticate using SASL (unknown error)
179 2018-01-10 15:23:30,069 INFO  [ReadOnlyZKClient] 
zookeeper.ReadOnlyZKClient(305): 0x57f23557 no activities for 3000 ms, close 
active connection. Will reconnect next time when there are new requests.
180 2018-01-10 15:23:30,069 DEBUG [ReadOnlyZKClient] zookeeper.ZooKeeper(673): 
Closing session: 0x160e261f37a0002
181 2018-01-10 15:23:30,069 DEBUG [ReadOnlyZKClient] 
zookeeper.ClientCnxn(1370): Closing client for session: 0x160e261f37a0002
182 2018-01-10 15:23:46,976 WARN  
[ReadOnlyZKClient-SendThread(user-164-127-0-0.play-internet.pl:51573)] 
zookeeper.ClientCnxn$SendThread(1108): Client session timed out, have not heard 
from server in 20008ms for sessionid 0x160e261f37a0002
183 2018-01-10 15:23:46,977 DEBUG 
[ReadOnlyZKClient-SendThread(user-164-127-0-0.play-internet.pl:51573)] 
zookeeper.ClientCnxn$SendThread(1146): An exception was thrown while closing 
send thread for session 0x160e261f37a0002 : Client session timed out, have not 
heard from server in 20008ms for sessionid 0x160e261f37a0002
184 2018-01-10 15:23:46,977 DEBUG 
[ReadOnlyZKClient-SendThread(user-164-127-0-0.play-internet.pl:51573)] 
zookeeper.ClientCnxnSocketNIO(203): Ignoring exception during shutdown input
185 java.net.SocketException: Socket is not connected
186   at sun.nio.ch.Net.translateToSocketException(Net.java:123)
187   at sun.nio.ch.Net.translateException(Net.java:157)
188   at sun.nio.ch.Net.translateException(Net.java:163)
189   at sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:401)
190   at 
org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:200)
191   at 
org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1246)
192   at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1182)
193 Caused by: java.nio.channels.NotYetConnectedException
194   at sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:782)
195   at sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:399)
196   ... 3 more
197 2018-01-10 15:23:46,977 DEBUG 
[ReadOnlyZKClient-SendThread(user-164-127-0-0.play-internet.pl:51573)] 
zookeeper.ClientCnxnSocketNIO(210): Ignoring exception during shutdown output
198 java.net.SocketException: Socket is not connected
199   at sun.nio.ch.Net.translateToSocketException(Net.java:123)
200   at sun.nio.ch.Net.translateException(Net.java:157)
201   at sun.nio.ch.Net.translateException(Net.java:163)
202   at sun.nio.ch.SocketAdaptor.shutdownOutput(SocketAdaptor.java:409)
203   at 
org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:207)
204   at 
org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1246)
205   at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1182)
206 Caused by: java.nio.channels.NotYetConnectedException
207   at sun.nio.ch.SocketChannelImpl.shutdownOutput(SocketChannelImpl.java:799)
208   at sun.nio.ch.SocketAdaptor.shutdownOutput(SocketAdaptor.java:407)
209   ... 3 more
210 2018-01-10 15:23:47,078 DEBUG [ReadOnlyZKClient] 
zookeeper.ClientCnxn(1354): Disconnecting client for session: 0x160e261f37a0002
211 2018-01-10 15:23:47,079 INFO  [ReadOnlyZKClient] zookeeper.ZooKeeper(684): 
Session: 0x160e261f37a0002 closed
212 2018-01-10 15:23:47,079 INFO  [ReadOnlyZKClient-EventThread] 
zookeeper.ClientCnxn$EventThread(519): EventThread shut down for session: 
0x160e261f37a0002
213 2018-01-10 15:23:47,079 WARN  [ReadOnlyZKClient] 
zookeeper.ReadOnlyZKClient$ZKTask$1(178): 0x57f23557 failed for get of /test, 
code = CONNECTIONLOSS, retries = 2
214 2018-01-10 15:23:47,179 INFO  [ReadOnlyZKClient] zookeeper.ZooKeeper(438): 
Initiating client connection, connectString=localhost:51573 
sessionTimeout=90000 
watcher=org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient$$Lambda$11/1499902826@57a14636
215 2018-01-10 15:23:47,180 INFO  
[ReadOnlyZKClient-SendThread(user-164-127-0-0.play-internet.pl:51573)] 
zookeeper.ClientCnxn$SendThread(1032): Opening socket connection to server 
user-164-127-0-0.play-internet.pl/164.127.0.0:51573. Will not attempt to 
authenticate using SASL (unknown error)
216 2018-01-10 15:23:50,180 INFO  [ReadOnlyZKClient] 
zookeeper.ReadOnlyZKClient(305): 0x57f23557 no activities for 3000 ms, close 
active connection. Will reconnect next time when there are new requests.
217 2018-01-10 15:23:50,181 DEBUG [ReadOnlyZKClient] zookeeper.ZooKeeper(673): 
Closing session: 0x0
218 2018-01-10 15:23:50,181 DEBUG [ReadOnlyZKClient] 
zookeeper.ClientCnxn(1370): Closing client for session: 0x0
219 2018-01-10 15:24:32,222 WARN  
[ReadOnlyZKClient-SendThread(user-164-127-0-0.play-internet.pl:51573)] 
zookeeper.ClientCnxn$SendThread(1108): Client session timed out, have not heard 
from server in 45042ms for sessionid 0x0
220 2018-01-10 15:24:32,223 DEBUG 
[ReadOnlyZKClient-SendThread(user-164-127-0-0.play-internet.pl:51573)] 
zookeeper.ClientCnxn$SendThread(1146): An exception was thrown while closing 
send thread for session 0x0 : Client session timed out, have not heard from 
server in 45042ms for sessionid 0x0
221 2018-01-10 15:24:32,223 DEBUG 
[ReadOnlyZKClient-SendThread(user-164-127-0-0.play-internet.pl:51573)] 
zookeeper.ClientCnxnSocketNIO(203): Ignoring exception during shutdown input
222 java.net.SocketException: Socket is not connected
223   at sun.nio.ch.Net.translateToSocketException(Net.java:123)
224   at sun.nio.ch.Net.translateException(Net.java:157)
225   at sun.nio.ch.Net.translateException(Net.java:163)
226   at sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:401)
227   at 
org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:200)
228   at 
org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1246)
229   at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1182)
230 Caused by: java.nio.channels.NotYetConnectedException
231   at sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:782)
232   at sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:399)
233   ... 3 more
234 2018-01-10 15:24:32,223 DEBUG 
[ReadOnlyZKClient-SendThread(user-164-127-0-0.play-internet.pl:51573)] 
zookeeper.ClientCnxnSocketNIO(210): Ignoring exception during shutdown output
235 java.net.SocketException: Socket is not connected
236   at sun.nio.ch.Net.translateToSocketException(Net.java:123)
237   at sun.nio.ch.Net.translateException(Net.java:157)
238   at sun.nio.ch.Net.translateException(Net.java:163)
239   at sun.nio.ch.SocketAdaptor.shutdownOutput(SocketAdaptor.java:409)
240   at 
org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:207)
241   at 
org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1246)
242   at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1182)
243 Caused by: java.nio.channels.NotYetConnectedException
244   at sun.nio.ch.SocketChannelImpl.shutdownOutput(SocketChannelImpl.java:799)
245   at sun.nio.ch.SocketAdaptor.shutdownOutput(SocketAdaptor.java:407)
246   ... 3 more
247 2018-01-10 15:24:32,324 DEBUG [ReadOnlyZKClient] 
zookeeper.ClientCnxn(1354): Disconnecting client for session: 0x0
248 2018-01-10 15:24:32,325 INFO  [ReadOnlyZKClient] zookeeper.ZooKeeper(684): 
Session: 0x0 closed
249 2018-01-10 15:24:32,325 INFO  [ReadOnlyZKClient-EventThread] 
zookeeper.ClientCnxn$EventThread(519): EventThread shut down for session: 0x0
250 2018-01-10 15:24:32,325 WARN  [ReadOnlyZKClient] 
zookeeper.ReadOnlyZKClient$ZKTask$1(178): 0x57f23557 failed for get of /test, 
code = CONNECTIONLOSS, retries = 3
251 2018-01-10 15:24:32,425 INFO  [ReadOnlyZKClient] zookeeper.ZooKeeper(438): 
Initiating client connection, connectString=localhost:51573 
sessionTimeout=90000 
watcher=org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient$$Lambda$11/1499902826@57a14636
252 2018-01-10 15:24:32,427 INFO  
[ReadOnlyZKClient-SendThread(user-164-127-0-0.play-internet.pl:51573)] 
zookeeper.ClientCnxn$SendThread(1032): Opening socket connection to server 
user-164-127-0-0.play-internet.pl/164.127.0.0:51573. Will not attempt to 
authenticate using SASL (unknown error)
253 2018-01-10 15:24:35,427 INFO  [ReadOnlyZKClient] 
zookeeper.ReadOnlyZKClient(305): 0x57f23557 no activities for 3000 ms, close 
active connection. Will reconnect next time when there are new requests.
254 2018-01-10 15:24:35,427 DEBUG [ReadOnlyZKClient] zookeeper.ZooKeeper(673): 
Closing session: 0x0
255 2018-01-10 15:24:35,427 DEBUG [ReadOnlyZKClient] 
zookeeper.ClientCnxn(1370): Closing client for session: 0x0
256 2018-01-10 15:25:17,468 WARN  
[ReadOnlyZKClient-SendThread(user-164-127-0-0.play-internet.pl:51573)] 
zookeeper.ClientCnxn$SendThread(1108): Client session timed out, have not heard 
from server in 45042ms for sessionid 0x0
257 2018-01-10 15:25:17,469 DEBUG 
[ReadOnlyZKClient-SendThread(user-164-127-0-0.play-internet.pl:51573)] 
zookeeper.ClientCnxn$SendThread(1146): An exception was thrown while closing 
send thread for session 0x0 : Client session timed out, have not heard from 
server in 45042ms for sessionid 0x0
258 2018-01-10 15:25:17,469 DEBUG 
[ReadOnlyZKClient-SendThread(user-164-127-0-0.play-internet.pl:51573)] 
zookeeper.ClientCnxnSocketNIO(203): Ignoring exception during shutdown input
259 java.net.SocketException: Socket is not connected
260   at sun.nio.ch.Net.translateToSocketException(Net.java:123)
261   at sun.nio.ch.Net.translateException(Net.java:157)
262   at sun.nio.ch.Net.translateException(Net.java:163)
263   at sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:401)
264   at 
org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:200)
265   at 
org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1246)
266   at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1182)
267 Caused by: java.nio.channels.NotYetConnectedException
268   at sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:782)
269   at sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:399)
270   ... 3 more
271 2018-01-10 15:25:17,469 DEBUG 
[ReadOnlyZKClient-SendThread(user-164-127-0-0.play-internet.pl:51573)] 
zookeeper.ClientCnxnSocketNIO(210): Ignoring exception during shutdown output
272 java.net.SocketException: Socket is not connected
273   at sun.nio.ch.Net.translateToSocketException(Net.java:123)
274   at sun.nio.ch.Net.translateException(Net.java:157)
275   at sun.nio.ch.Net.translateException(Net.java:163)
276   at sun.nio.ch.SocketAdaptor.shutdownOutput(SocketAdaptor.java:409)
277   at 
org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:207)
278   at 
org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1246)
279   at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1182)
280 Caused by: java.nio.channels.NotYetConnectedException
281   at sun.nio.ch.SocketChannelImpl.shutdownOutput(SocketChannelImpl.java:799)
282   at sun.nio.ch.SocketAdaptor.shutdownOutput(SocketAdaptor.java:407)
283   ... 3 more
284 2018-01-10 15:25:17,570 DEBUG [ReadOnlyZKClient] 
zookeeper.ClientCnxn(1354): Disconnecting client for session: 0x0
285 2018-01-10 15:25:17,571 INFO  [ReadOnlyZKClient] zookeeper.ZooKeeper(684): 
Session: 0x0 closed
286 2018-01-10 15:25:17,571 INFO  [ReadOnlyZKClient-EventThread] 
zookeeper.ClientCnxn$EventThread(519): EventThread shut down for session: 0x0
287 2018-01-10 15:25:17,571 WARN  [ReadOnlyZKClient] 
zookeeper.ReadOnlyZKClient$ZKTask$1(182): 0x57f23557 failed for get of /test, 
code = CONNECTIONLOSS, retries = 3, give up
288 2018-01-10 15:25:17,609 INFO  [main] hbase.ResourceChecker(172): after: 
zookeeper.TestReadOnlyZKClient#testSessionExpire Thread=12 (was 13), 
OpenFileDescriptor=108 (was 112), MaxFileDescriptor=32000 (was 32000), 
SystemLoadAverage=6 (was 67), ProcessCount=833 (was 833), 
AvailableMemoryMB=12090 (was 12065) - AvailableMemoryMB LEAK? -
{code}

> Miscellany of fixes for hbase-zookeeper tests to make them more robust
> ----------------------------------------------------------------------
>
>                 Key: HBASE-19753
>                 URL: https://issues.apache.org/jira/browse/HBASE-19753
>             Project: HBase
>          Issue Type: Bug
>            Reporter: stack
>            Assignee: stack
>         Attachments: HBASE-19753.branch-2.001.patch
>
>
> On my cluster which slows zk, tests hbase-zookeeper rarely all pass.



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