ptyin opened a new issue, #12:
URL: https://github.com/apache/incubator-seata-k8s/issues/12
Pods managed by seata-server StatefulSet sometimes fail to start. The detail
error stack is as follow:
```
java.lang.RuntimeException: java.net.UnknownHostException:
seata-server-0.seata-server-cluster: Name or service not known
at io.seata.common.util.NetUtil.convertIpIfNecessary(NetUtil.java:330)
at io.seata.common.util.NetUtil.isValidIp(NetUtil.java:309)
at io.seata.server.Server.start(Server.java:68)
at io.seata.server.ServerRunner.run(ServerRunner.java:60)
at
org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:765)
at
org.springframework.boot.SpringApplication.lambda$callRunners$2(SpringApplication.java:749)
at
java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
at
java.util.stream.SortedOps$SizedRefSortingSink.end(SortedOps.java:357)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:483)
at
java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
at
java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
at
java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at
java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:485)
at
org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:744)
at
org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
at
org.springframework.boot.SpringApplication.run(SpringApplication.java:1300)
at
org.springframework.boot.SpringApplication.run(SpringApplication.java:1289)
at io.seata.server.ServerApplication.main(ServerApplication.java:30)
Caused by: java.net.UnknownHostException:
seata-server-0.seata-server-cluster: Name or service not known
at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:929)
at
java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1330)
at java.net.InetAddress.getAllByName0(InetAddress.java:1283)
at java.net.InetAddress.getAllByName(InetAddress.java:1199)
at java.net.InetAddress.getAllByName(InetAddress.java:1127)
at java.net.InetAddress.getByName(InetAddress.java:1077)
at io.seata.common.util.NetUtil.convertIpIfNecessary(NetUtil.java:328)
... 18 common frames omitted
```
The underlying reason is that seata-server would call
`NetUtil.convertIpIfNecessary` method to translate host name of the headless
service subdomain, e.g., "seata-server-0.seata-server-cluster". However, the
coredns service may not add the service name registry yet, leading to the
occasional `UnknownHostException`.
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