timed sync task failed

[lkxiaolou]

Describe what happened (or what feature you want)

2020-03-03 04:06:47,613 ERROR timed sync task failed.

java.lang.ArrayIndexOutOfBoundsException: null
at sun.security.provider.DigestBase.engineUpdate(DigestBase.java:115)
at sun.security.provider.MD5.implDigest(MD5.java:109)
at sun.security.provider.DigestBase.engineDigest(DigestBase.java:183)
at sun.security.provider.DigestBase.engineDigest(DigestBase.java:162)
at java.security.MessageDigest$Delegate.engineDigest(MessageDigest.java:592)
at java.security.MessageDigest.digest(MessageDigest.java:365)
at java.security.MessageDigest.digest(MessageDigest.java:411)
at com.alibaba.nacos.naming.core.Instances.recalculateChecksum(Instances.java:88)
at com.alibaba.nacos.naming.core.Instances.getChecksum(Instances.java:72)
at com.alibaba.nacos.naming.consistency.ephemeral.distro.DataSyncer$TimedSync.run(DataSyncer.java:179)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

Tell us your environment

java8 +nacos 1.1.4