Remember-Forever opened a new issue #2378: A question about IndexOutOfBoundsException URL: https://github.com/apache/incubator-skywalking/issues/2378 Please answer these questions before submitting your issue. - Why do you submit this issue? - [√ ] Question or discussion - [ ] Bug - [ ] Requirement - [ ] Feature or performance improvement I build skywalking and elasticsearch on openshift, and run a demo(springboot project) on my pc. Then I try to find my endpoint on skywalking-ui, but the oap-server's log shows error. Skywalking version is 6.0.0-GA, and my jre is 1.8.0_161. The log detail: `2019-03-19 02:59:01,480 - org.apache.skywalking.oap.server.core.register.worker.RegisterRemoteWorker -1783846 [DataCarrier.default.Consumser.0.Thread] ERROR [] - Index: 0, Size: 0 java.lang.IndexOutOfBoundsException: Index: 0, Size: 0 at java.util.LinkedList.checkElementIndex(LinkedList.java:555) ~[?:1.8.0_181] at java.util.LinkedList.get(LinkedList.java:476) ~[?:1.8.0_181] at org.apache.skywalking.oap.server.core.remote.selector.ForeverFirstSelector.select(ForeverFirstSelector.java:37) ~[server-core-6.0.0-GA.jar:6.0.0-GA] at org.apache.skywalking.oap.server.core.remote.RemoteSenderService.send(RemoteSenderService.java:58) ~[server-core-6.0.0-GA.jar:6.0.0-GA] at org.apache.skywalking.oap.server.core.register.worker.RegisterRemoteWorker.in(RegisterRemoteWorker.java:47) ~[server-core-6.0.0-GA.jar:6.0.0-GA] at org.apache.skywalking.oap.server.core.register.worker.RegisterRemoteWorker.in(RegisterRemoteWorker.java:32) ~[server-core-6.0.0-GA.jar:6.0.0-GA] at java.util.HashMap$Values.forEach(HashMap.java:981) [?:1.8.0_181] at org.apache.skywalking.oap.server.core.register.worker.RegisterDistinctWorker.onWork(RegisterDistinctWorker.java:64) [server-core-6.0.0-GA.jar:6.0.0-GA] at org.apache.skywalking.oap.server.core.register.worker.RegisterDistinctWorker.access$100(RegisterDistinctWorker.java:32) [server-core-6.0.0-GA.jar:6.0.0-GA] at org.apache.skywalking.oap.server.core.register.worker.RegisterDistinctWorker$AggregatorConsumer.consume(RegisterDistinctWorker.java:91) [server-core-6.0.0-GA.jar:6.0.0-GA] at org.apache.skywalking.apm.commons.datacarrier.consumer.ConsumerThread.consume(ConsumerThread.java:101) [apm-datacarrier-6.0.0-GA.jar:6.0.0-GA] at org.apache.skywalking.apm.commons.datacarrier.consumer.ConsumerThread.run(ConsumerThread.java:68) [apm-datacarrier-6.0.0-GA.jar:6.0.0-GA]` Is it caused by my jre version？
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