[ 
https://issues.apache.org/jira/browse/FLINK-11720?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17029742#comment-17029742
 ] 

Robert Metzger commented on FLINK-11720:
----------------------------------------

Now, I saw this issue in the end to end tests as well:



{noformat}
2020-02-03T16:57:09.7903136Z 
==============================================================================
2020-02-03T16:57:09.7903794Z Running 'Elasticsearch (v5.1.2) sink end-to-end 
test'
2020-02-03T16:57:09.7903895Z 
==============================================================================
2020-02-03T16:57:09.7918327Z TEST_DATA_DIR: 
/home/vsts/work/1/s/flink-end-to-end-tests/test-scripts/temp-test-directory-09791214290
2020-02-03T16:57:09.9917909Z Flink dist directory: 
/home/vsts/work/1/s/flink-dist/target/flink-1.11-SNAPSHOT-bin/flink-1.11-SNAPSHOT
2020-02-03T16:57:10.0166226Z Downloading Elasticsearch from 
https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.1.2.tar.gz 
...
2020-02-03T16:57:10.0268132Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:10.0293586Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:10.0295194Z 
2020-02-03T16:57:10.0441194Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0
2020-02-03T16:57:11.0423011Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0
2020-02-03T16:57:11.8143710Z   1 31.7M    1  543k    0     0   533k      0  
0:01:00  0:00:01  0:00:59  533k
2020-02-03T16:57:11.8144973Z 100 31.7M  100 31.7M    0     0  17.7M      0  
0:00:01  0:00:01 --:--:-- 17.7M
2020-02-03T16:57:12.1782169Z Waiting for Elasticsearch node to work...
2020-02-03T16:57:12.1899563Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:12.1900056Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:12.1900290Z 
2020-02-03T16:57:12.1955732Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:13.2100655Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:13.2130016Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:13.2131645Z 
2020-02-03T16:57:13.2199423Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:14.2298688Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:14.2299403Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:14.2299536Z 
2020-02-03T16:57:14.2342166Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:15.2760713Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:15.2763632Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:15.2763911Z 
2020-02-03T16:57:15.2831743Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:16.3399071Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:16.3517859Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:16.3518305Z 
2020-02-03T16:57:16.3520404Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:16.4845623Z [2020-02-03T16:57:16,483][INFO ][o.e.n.Node        
       ] [] initializing ...
2020-02-03T16:57:16.6859295Z [2020-02-03T16:57:16,684][INFO 
][o.e.e.NodeEnvironment    ] [u39Fazq] using [1] data paths, mounts [[/ 
(/dev/sda1)]], net usable_space [11.8gb], net total_space [83.1gb], spins? 
[possibly], types [ext4]
2020-02-03T16:57:16.6865435Z [2020-02-03T16:57:16,686][INFO 
][o.e.e.NodeEnvironment    ] [u39Fazq] heap size [1.9gb], compressed ordinary 
object pointers [true]
2020-02-03T16:57:16.6880762Z [2020-02-03T16:57:16,687][INFO ][o.e.n.Node        
       ] node name [u39Fazq] derived from node ID [u39FazqBSx6gF5LyWwoeIw]; set 
[node.name] to override
2020-02-03T16:57:16.6901095Z [2020-02-03T16:57:16,689][INFO ][o.e.n.Node        
       ] version[5.1.2], pid[51259], build[c8c4c16/2017-01-11T20:18:39.146Z], 
OS[Linux/5.0.0-1028-azure/amd64], JVM[Azul Systems, Inc./OpenJDK 64-Bit Server 
VM/1.8.0_242/25.242-b20]
2020-02-03T16:57:17.4048496Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:17.4076118Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:17.4077841Z 
2020-02-03T16:57:17.4103607Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:17.5055618Z [2020-02-03T16:57:17,505][INFO 
][o.e.p.PluginsService     ] [u39Fazq] loaded module [aggs-matrix-stats]
2020-02-03T16:57:17.5059823Z [2020-02-03T16:57:17,505][INFO 
][o.e.p.PluginsService     ] [u39Fazq] loaded module [ingest-common]
2020-02-03T16:57:17.5064203Z [2020-02-03T16:57:17,506][INFO 
][o.e.p.PluginsService     ] [u39Fazq] loaded module [lang-expression]
2020-02-03T16:57:17.5067827Z [2020-02-03T16:57:17,506][INFO 
][o.e.p.PluginsService     ] [u39Fazq] loaded module [lang-groovy]
2020-02-03T16:57:17.5071296Z [2020-02-03T16:57:17,506][INFO 
][o.e.p.PluginsService     ] [u39Fazq] loaded module [lang-mustache]
2020-02-03T16:57:17.5073878Z [2020-02-03T16:57:17,507][INFO 
][o.e.p.PluginsService     ] [u39Fazq] loaded module [lang-painless]
2020-02-03T16:57:17.5076504Z [2020-02-03T16:57:17,507][INFO 
][o.e.p.PluginsService     ] [u39Fazq] loaded module [percolator]
2020-02-03T16:57:17.5081331Z [2020-02-03T16:57:17,507][INFO 
][o.e.p.PluginsService     ] [u39Fazq] loaded module [reindex]
2020-02-03T16:57:17.5085923Z [2020-02-03T16:57:17,508][INFO 
][o.e.p.PluginsService     ] [u39Fazq] loaded module [transport-netty3]
2020-02-03T16:57:17.5088488Z [2020-02-03T16:57:17,508][INFO 
][o.e.p.PluginsService     ] [u39Fazq] loaded module [transport-netty4]
2020-02-03T16:57:17.5095509Z [2020-02-03T16:57:17,509][INFO 
][o.e.p.PluginsService     ] [u39Fazq] no plugins loaded
2020-02-03T16:57:18.1227426Z [2020-02-03T16:57:18,121][WARN 
][o.e.b.ElasticsearchUncaughtExceptionHandler] [] uncaught exception in thread 
[main]
2020-02-03T16:57:18.1228258Z org.elasticsearch.bootstrap.StartupException: 
java.lang.IllegalStateException: No match found
2020-02-03T16:57:18.1229050Z    at 
org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:125) 
~[elasticsearch-5.1.2.jar:5.1.2]
2020-02-03T16:57:18.1229853Z    at 
org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:112) 
~[elasticsearch-5.1.2.jar:5.1.2]
2020-02-03T16:57:18.1230630Z    at 
org.elasticsearch.cli.SettingCommand.execute(SettingCommand.java:54) 
~[elasticsearch-5.1.2.jar:5.1.2]
2020-02-03T16:57:18.1231260Z    at 
org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:122) 
~[elasticsearch-5.1.2.jar:5.1.2]
2020-02-03T16:57:18.1231815Z    at 
org.elasticsearch.cli.Command.main(Command.java:88) 
~[elasticsearch-5.1.2.jar:5.1.2]
2020-02-03T16:57:18.1232579Z    at 
org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:89) 
~[elasticsearch-5.1.2.jar:5.1.2]
2020-02-03T16:57:18.1233284Z    at 
org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:82) 
~[elasticsearch-5.1.2.jar:5.1.2]
2020-02-03T16:57:18.1233586Z Caused by: java.lang.IllegalStateException: No 
match found
2020-02-03T16:57:18.1233803Z    at 
java.util.regex.Matcher.group(Matcher.java:536) ~[?:1.8.0_242]
2020-02-03T16:57:18.1234303Z    at 
org.elasticsearch.monitor.os.OsProbe.getControlGroups(OsProbe.java:213) 
~[elasticsearch-5.1.2.jar:5.1.2]
2020-02-03T16:57:18.1234855Z    at 
org.elasticsearch.monitor.os.OsProbe.getCgroup(OsProbe.java:402) 
~[elasticsearch-5.1.2.jar:5.1.2]
2020-02-03T16:57:18.1235407Z    at 
org.elasticsearch.monitor.os.OsProbe.osStats(OsProbe.java:454) 
~[elasticsearch-5.1.2.jar:5.1.2]
2020-02-03T16:57:18.1236003Z    at 
org.elasticsearch.monitor.os.OsService.<init>(OsService.java:45) 
~[elasticsearch-5.1.2.jar:5.1.2]
2020-02-03T16:57:18.1238605Z    at 
org.elasticsearch.monitor.MonitorService.<init>(MonitorService.java:45) 
~[elasticsearch-5.1.2.jar:5.1.2]
2020-02-03T16:57:18.1239006Z    at 
org.elasticsearch.node.Node.<init>(Node.java:345) 
~[elasticsearch-5.1.2.jar:5.1.2]
2020-02-03T16:57:18.1239289Z    at 
org.elasticsearch.node.Node.<init>(Node.java:229) 
~[elasticsearch-5.1.2.jar:5.1.2]
2020-02-03T16:57:18.1239597Z    at 
org.elasticsearch.bootstrap.Bootstrap$6.<init>(Bootstrap.java:214) 
~[elasticsearch-5.1.2.jar:5.1.2]
2020-02-03T16:57:18.1239886Z    at 
org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:214) 
~[elasticsearch-5.1.2.jar:5.1.2]
2020-02-03T16:57:18.1240369Z    at 
org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:306) 
~[elasticsearch-5.1.2.jar:5.1.2]
2020-02-03T16:57:18.1240705Z    at 
org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:121) 
~[elasticsearch-5.1.2.jar:5.1.2]
2020-02-03T16:57:18.1240780Z    ... 6 more
2020-02-03T16:57:18.4304460Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:18.4304739Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:18.4304783Z 
2020-02-03T16:57:18.4308990Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:19.4415688Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:19.4416628Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:19.4417066Z 
2020-02-03T16:57:19.4420744Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:20.4523273Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:20.4525962Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:20.4526191Z 
2020-02-03T16:57:20.4532402Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:21.4640906Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:21.4641509Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:21.4641664Z 
2020-02-03T16:57:21.4684761Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:22.4787130Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:22.4787738Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:22.4787862Z 
2020-02-03T16:57:22.4831270Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:23.4933056Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:23.4933733Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:23.4934285Z 
2020-02-03T16:57:23.4976456Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:24.5086803Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:24.5087552Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:24.5087721Z 
2020-02-03T16:57:24.5130945Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:25.5240246Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:25.5240971Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:25.5241637Z 
2020-02-03T16:57:25.5245009Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:26.5352903Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:26.5353591Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:26.5357401Z 
2020-02-03T16:57:26.5358200Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:27.5469937Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:27.5470793Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:27.5471065Z 
2020-02-03T16:57:27.5474384Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:28.5578695Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:28.5579469Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:28.5579687Z 
2020-02-03T16:57:28.5582885Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:29.5692834Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:29.5693592Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:29.5693833Z 
2020-02-03T16:57:29.5697072Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:30.5803565Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:30.5804371Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:30.5804596Z 
2020-02-03T16:57:30.5852156Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:31.5978806Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:31.5980411Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:31.5980701Z 
2020-02-03T16:57:31.6022605Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:32.6140206Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:32.6140963Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:32.6141248Z 
2020-02-03T16:57:32.6143956Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:33.6278064Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:33.6278886Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:33.6279293Z 
2020-02-03T16:57:33.6320400Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:34.6423791Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:34.6425149Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:34.6425430Z 
2020-02-03T16:57:34.6468169Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:35.6585988Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:35.6587057Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:35.6587449Z 
2020-02-03T16:57:35.6626740Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:36.6727962Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:36.6729031Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:36.6729285Z 
2020-02-03T16:57:36.6732037Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:37.6845335Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:37.6846572Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:37.6846810Z 
2020-02-03T16:57:37.6851139Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:38.6962492Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:38.6963633Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:38.6963927Z 
2020-02-03T16:57:38.6967649Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:39.7072258Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:39.7073366Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:39.7073622Z 
2020-02-03T16:57:39.7115305Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:40.7223410Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:40.7223671Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:40.7223931Z 
2020-02-03T16:57:40.7227432Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:41.7329644Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:41.7330279Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:41.7330447Z 
2020-02-03T16:57:41.7333485Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:42.7441678Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:42.7441989Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:42.7474417Z 
2020-02-03T16:57:42.7475272Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:43.7562899Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:43.7564216Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:43.7564741Z 
2020-02-03T16:57:43.7568818Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:44.7680818Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:44.7701240Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:44.7714577Z 
2020-02-03T16:57:44.7718331Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:45.7846552Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:45.7847123Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:45.7847209Z 
2020-02-03T16:57:45.7850506Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:46.7957005Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:46.7957614Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:46.7957929Z 
2020-02-03T16:57:46.7983469Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:47.8086218Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:47.8087012Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:47.8087298Z 
2020-02-03T16:57:47.8130108Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:48.8243516Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:48.8244074Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:48.8244214Z 
2020-02-03T16:57:48.8247583Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:49.8347051Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:49.8347840Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:49.8347998Z 
2020-02-03T16:57:49.8392300Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:50.8491219Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:50.8492085Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:50.8492312Z 
2020-02-03T16:57:50.8495784Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:51.8602948Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:51.8603555Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:51.8603809Z 
2020-02-03T16:57:51.8607138Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:52.8714750Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:52.8715461Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:52.8715546Z 
2020-02-03T16:57:52.8720517Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:53.8828376Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:53.8828730Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:53.8828795Z 
2020-02-03T16:57:53.8833592Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:54.8946193Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:54.8946706Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:54.8947247Z 
2020-02-03T16:57:54.8996055Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:55.9096394Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:55.9097094Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:55.9097326Z 
2020-02-03T16:57:55.9100977Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:56.9204679Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:56.9204979Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:56.9205061Z 
2020-02-03T16:57:56.9208899Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:57.9308127Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:57.9309047Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:57.9309282Z 
2020-02-03T16:57:57.9355335Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:58.9455068Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:58.9455888Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:58.9456141Z 
2020-02-03T16:57:58.9460244Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:57:59.9590633Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:57:59.9595823Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:57:59.9595946Z 
2020-02-03T16:57:59.9646587Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:58:00.9741715Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:58:00.9742465Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:58:00.9742713Z 
2020-02-03T16:58:00.9791237Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:58:01.9925175Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:58:01.9938613Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:58:01.9938970Z 
2020-02-03T16:58:01.9944081Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:58:03.0048492Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:58:03.0049527Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:58:03.0049735Z 
2020-02-03T16:58:03.0053458Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:58:04.0158070Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:58:04.0159016Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:58:04.0159290Z 
2020-02-03T16:58:04.0161194Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:58:05.0272436Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:58:05.0273743Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:58:05.0273978Z 
2020-02-03T16:58:05.0276193Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:58:06.0376731Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:58:06.0377485Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:58:06.0377683Z 
2020-02-03T16:58:06.0420719Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:58:07.0526908Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:58:07.0527640Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:58:07.0527903Z 
2020-02-03T16:58:07.0531042Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:58:08.0632905Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:58:08.0633380Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:58:08.0633734Z 
2020-02-03T16:58:08.0676514Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:58:09.0780230Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:58:09.0781576Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:58:09.0781788Z 
2020-02-03T16:58:09.0785095Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:58:10.0916955Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:58:10.0947653Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:58:10.0948033Z 
2020-02-03T16:58:10.0997798Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:58:11.1108080Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:58:11.1109360Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:58:11.1109655Z 
2020-02-03T16:58:11.1113517Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:58:12.1213892Z   % Total    % Received % Xferd  Average Speed   
Time    Time     Time  Current
2020-02-03T16:58:12.1214228Z                                  Dload  Upload   
Total   Spent    Left  Speed
2020-02-03T16:58:12.1214282Z 
2020-02-03T16:58:12.1218065Z   0     0    0     0    0     0      0      0 
--:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to localhost port 
9200: Connection refused
2020-02-03T16:58:13.1241275Z Elasticsearch node is not working
2020-02-03T16:58:13.1244586Z [FAIL] Test script contains errors.
2020-02-03T16:58:13.1254193Z Checking for errors...
2020-02-03T16:58:13.1447726Z No errors in log files.
2020-02-03T16:58:13.1447860Z Checking for exceptions...
2020-02-03T16:58:13.1700454Z No exceptions in log files.
2020-02-03T16:58:13.1701187Z Checking for non-empty .out files...
2020-02-03T16:58:13.1717968Z grep: 
/home/vsts/work/1/s/flink-dist/target/flink-1.11-SNAPSHOT-bin/flink-1.11-SNAPSHOT/log/*.out:
 No such file or directory
2020-02-03T16:58:13.1722347Z No non-empty .out files.
2020-02-03T16:58:13.1722614Z 
2020-02-03T16:58:13.1723071Z [FAIL] 'Elasticsearch (v5.1.2) sink end-to-end 
test' failed after 1 minutes and 4 seconds! Test exited with exit code 1
2020-02-03T16:58:13.1723624Z 
2020-02-03T16:58:13.5425633Z No taskexecutor daemon to stop on host fv-az725.
2020-02-03T16:58:13.7691029Z No standalonesession daemon to stop on host 
fv-az725.
{noformat}


> ES5: ElasticsearchSinkITCase failing
> ------------------------------------
>
>                 Key: FLINK-11720
>                 URL: https://issues.apache.org/jira/browse/FLINK-11720
>             Project: Flink
>          Issue Type: Bug
>          Components: Connectors / ElasticSearch
>    Affects Versions: 1.6.4, 1.8.0, 1.9.0, 1.10.0
>            Reporter: Robert Metzger
>            Priority: Critical
>              Labels: test-stability
>
> On Google Cloud VMs (Ubuntu 18.04), the surefire tests are failing with the 
> following error:
> {code:java}
> Running 
> org.apache.flink.streaming.connectors.elasticsearch5.ElasticsearchSinkITCase
> Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 14.972 sec 
> <<< FAILURE! - in org.apache.flin
> k.streaming.connectors.elasticsearch5.ElasticsearchSinkITCase
> org.apache.flink.streaming.connectors.elasticsearch5.ElasticsearchSinkITCase 
> Time elapsed: 14.972 sec <<<
> ERROR!
> java.lang.IllegalStateException: No match found
> at java.util.regex.Matcher.group(Matcher.java:536)
> at org.elasticsearch.monitor.os.OsProbe.getControlGroups(OsProbe.java:213)
> at org.elasticsearch.monitor.os.OsProbe.getCgroup(OsProbe.java:402)
> at org.elasticsearch.monitor.os.OsProbe.osStats(OsProbe.java:454)
> at org.elasticsearch.monitor.os.OsService.<init>(OsService.java:45)
> at org.elasticsearch.monitor.MonitorService.<init>(MonitorService.java:45)
> at org.elasticsearch.node.Node.<init>(Node.java:345)
> at 
> org.apache.flink.streaming.connectors.elasticsearch.EmbeddedElasticsearchNodeEnvironmentImpl$Plug
> inNode.<init>(EmbeddedElasticsearchNodeEnvironmentImpl.java:78)
> at 
> org.apache.flink.streaming.connectors.elasticsearch.EmbeddedElasticsearchNodeEnvironmentImpl.star
> t(EmbeddedElasticsearchNodeEnvironmentImpl.java:54)
> at 
> org.apache.flink.streaming.connectors.elasticsearch.ElasticsearchSinkTestBase.prepare(Elasticsear
> chSinkTestBase.java:72)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> {code}
> or
> {{org.apache.flink.streaming.connectors.elasticsearch5.ElasticsearchSinkITCase
>  Time elapsed: 3.196 s <<< FAILURE!}}
>  {{java.lang.AssertionError: 0::/user.slice/user-1001.slice/session-33.scope}}



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