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https://issues.apache.org/jira/browse/FLINK-31818?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17712921#comment-17712921
 ] 

SeungMin commented on FLINK-31818:
----------------------------------

[~JunRuiLi] 

Oh, I will test, and if this modification is correct than i will create pr to 
correct the documentation  :D

> parsing error of 'security.kerberos.access.hadoopFileSystems' in 
> flink-conf.yaml
> --------------------------------------------------------------------------------
>
>                 Key: FLINK-31818
>                 URL: https://issues.apache.org/jira/browse/FLINK-31818
>             Project: Flink
>          Issue Type: Bug
>          Components: Runtime / Configuration
>    Affects Versions: 1.17.0
>            Reporter: SeungMin
>            Priority: Major
>              Labels: bug
>             Fix For: 1.17.0
>
>
> There is a parsing error when I gave two or more hdfs namenodes URI separated 
> by commas as the value of key attribute 
> 'security.kerberos.access.hadoopFileSystems'.
>  
> For example, I set this key attribute and value like below in flink-conf.yaml,
> {code:java}
> security.kerberos.access.hadoopFileSystems: 
> hdfs://hadoop-nn1.testurl.com:8020,hdfs://hadoop-nn2.testurl.com:8020 {code}
>  
> then, the slash "/" is missing in second URI in parsed value
> {code:java}
> hdfs://hadoop-nn1.testurl.com:8020,hdfs:/hadoop-nn2.testurl.com:8020{code}
>  
>  
> Received error message is here.
> {code:java}
> Caused by: org.apache.flink.util.FlinkRuntimeException: java.io.IOException: 
> Incomplete HDFS URI, no host: 
> hdfs://hadoop-nn1.testurl.com:8020,hdfs:/hadoop-nn2.testurl.com:8020
>    at 
> org.apache.flink.runtime.security.token.hadoop.HadoopFSDelegationTokenProvider.lambda$getFileSystemsToAccess$2(HadoopFSDelegationTokenProvider.java:168)
>  ~[flink-dist-1.17.0.jar:1.17.0]
>    at java.util.ArrayList.forEach(ArrayList.java:1259) ~[?:1.8.0_362]
>    at 
> org.apache.flink.runtime.security.token.hadoop.HadoopFSDelegationTokenProvider.getFileSystemsToAccess(HadoopFSDelegationTokenProvider.java:157)
>  ~[flink-dist-1.17.0.jar:1.17.0]
>    at 
> org.apache.flink.runtime.security.token.hadoop.HadoopFSDelegationTokenProvider.lambda$obtainDelegationTokens$1(HadoopFSDelegationTokenProvider.java:113)
>  ~[flink-dist-1.17.0.jar:1.17.0]
>    at java.security.AccessController.doPrivileged(Native Method) 
> ~[?:1.8.0_362]
>    at javax.security.auth.Subject.doAs(Subject.java:422) ~[?:1.8.0_362]
>    at 
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1966)
>  ~[hadoop-common-2.10.0-khp-20210414.jar:?]
>    at 
> org.apache.flink.runtime.security.token.hadoop.HadoopFSDelegationTokenProvider.obtainDelegationTokens(HadoopFSDelegationTokenProvider.java:108)
>  ~[flink-dist-1.17.0.jar:1.17.0]
>    at 
> org.apache.flink.runtime.security.token.DefaultDelegationTokenManager.lambda$obtainDelegationTokensAndGetNextRenewal$1(DefaultDelegationTokenManager.java:228)
>  ~[flink-dist-1.17.0.jar:1.17.0]
>    ... 13 more
> Caused by: java.io.IOException: Incomplete HDFS URI, no host: 
> hdfs://hadoop-bi-nn1.dakao.io:8020,hdfs:/hadoop-bi-nn2.dakao.io:8020
>    at 
> org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:156)
>  ~[hadoop-hdfs-client-2.10.0-khp-20210414.jar:?]
>    at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:3241) 
> ~[hadoop-common-2.10.0-khp-20210414.jar:?]
>    at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:122) 
> ~[hadoop-common-2.10.0-khp-20210414.jar:?]
>    at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:3290) 
> ~[hadoop-common-2.10.0-khp-20210414.jar:?]
>    at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:3258) 
> ~[hadoop-common-2.10.0-khp-20210414.jar:?]
>    at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:471) 
> ~[hadoop-common-2.10.0-khp-20210414.jar:?]
>    at org.apache.hadoop.fs.Path.getFileSystem(Path.java:356) 
> ~[hadoop-common-2.10.0-khp-20210414.jar:?]
>    at 
> org.apache.flink.runtime.security.token.hadoop.HadoopFSDelegationTokenProvider.lambda$getFileSystemsToAccess$2(HadoopFSDelegationTokenProvider.java:163)
>  ~[flink-dist-1.17.0.jar:1.17.0]
>    at java.util.ArrayList.forEach(ArrayList.java:1259) ~[?:1.8.0_362]
>    at 
> org.apache.flink.runtime.security.token.hadoop.HadoopFSDelegationTokenProvider.getFileSystemsToAccess(HadoopFSDelegationTokenProvider.java:157)
>  ~[flink-dist-1.17.0.jar:1.17.0]
>    at 
> org.apache.flink.runtime.security.token.hadoop.HadoopFSDelegationTokenProvider.lambda$obtainDelegationTokens$1(HadoopFSDelegationTokenProvider.java:113)
>  ~[flink-dist-1.17.0.jar:1.17.0]
>    at java.security.AccessController.doPrivileged(Native Method) 
> ~[?:1.8.0_362]
>    at javax.security.auth.Subject.doAs(Subject.java:422) ~[?:1.8.0_362]
>    at 
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1966)
>  ~[hadoop-common-2.10.0-khp-20210414.jar:?]
>    at 
> org.apache.flink.runtime.security.token.hadoop.HadoopFSDelegationTokenProvider.obtainDelegationTokens(HadoopFSDelegationTokenProvider.java:108)
>  ~[flink-dist-1.17.0.jar:1.17.0]
>    at 
> org.apache.flink.runtime.security.token.DefaultDelegationTokenManager.lambda$obtainDelegationTokensAndGetNextRenewal$1(DefaultDelegationTokenManager.java:228)
>  ~[flink-dist-1.17.0.jar:1.17.0]
>    ... 13 more {code}
>  



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