Exception in thread "main" java.lang.IllegalArgumentException: Malformed \uxxxx encoding

i installed graylog on centos 7,

pls help me, i will install on company server

however i get this error:

Aug 09 16:40:39 localhost.localdomain graylog-server[19850]: OpenJDK 64-Bit Server VM warning: If the number of processors is expected to increase from one, then you should configure the number of parallel GC th
Aug 09 16:40:43 localhost.localdomain graylog-server[19850]: Exception in thread “main” java.lang.IllegalArgumentException: Malformed \uxxxx encoding.
Aug 09 16:40:43 localhost.localdomain graylog-server[19850]: at java.util.Properties.loadConvert(Properties.java:574)
Aug 09 16:40:43 localhost.localdomain graylog-server[19850]: at java.util.Properties.load0(Properties.java:391)
Aug 09 16:40:43 localhost.localdomain graylog-server[19850]: at java.util.Properties.load(Properties.java:317)
Aug 09 16:40:43 localhost.localdomain graylog-server[19850]: at com.github.joschi.jadconfig.repositories.PropertiesRepository.open(PropertiesRepository.java:77)
Aug 09 16:40:43 localhost.localdomain graylog-server[19850]: at com.github.joschi.jadconfig.JadConfig.process(JadConfig.java:93)
Aug 09 16:40:43 localhost.localdomain graylog-server[19850]: at org.graylog2.bootstrap.CmdLineTool.processConfiguration(CmdLineTool.java:351)
Aug 09 16:40:43 localhost.localdomain graylog-server[19850]: at org.graylog2.bootstrap.CmdLineTool.getPluginPath(CmdLineTool.java:285)
Aug 09 16:40:43 localhost.localdomain graylog-server[19850]: at org.graylog2.bootstrap.CmdLineTool.run(CmdLineTool.java:172)
Aug 09 16:40:43 localhost.localdomain graylog-server[19850]: at org.graylog2.bootstrap.Main.main(Main.java:50)
Aug 09 16:40:43 localhost.localdomain systemd[1]: graylog-server.service: main process exited, code=exited, status=1/FAILURE
Aug 09 16:40:43 localhost.localdomain systemd[1]: Unit graylog-server.service entered failed state.
Aug 09 16:40:43 localhost.localdomain systemd[1]: graylog-server.service failed.
Aug 09 16:40:53 localhost.localdomain systemd[1]: graylog-server.service holdoff time over, scheduling restart.
Aug 09 16:40:53 localhost.localdomain systemd[1]: Stopped Graylog server.
Aug 09 16:40:53 localhost.localdomain systemd[1]: Started Graylog server.
Aug 09 16:40:53 localhost.localdomain graylog-server[19869]: OpenJDK 64-Bit Server VM warning: If the number of processors is expected to increase from one, then you should configure the number of parallel GC th

did you install java 8 or java 11 on that system?

i solved this issue,

i wrongly installed java two times

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