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https://issues.apache.org/jira/browse/HADOOP-17011?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Shilun Fan updated HADOOP-17011:
--------------------------------
Target Version/s: 3.4.0
Affects Version/s: 3.4.0
> Tolerate leading and trailing spaces in fs.defaultFS
> ----------------------------------------------------
>
> Key: HADOOP-17011
> URL: https://issues.apache.org/jira/browse/HADOOP-17011
> Project: Hadoop Common
> Issue Type: Bug
> Components: common
> Affects Versions: 3.4.0
> Reporter: Ctest
> Assignee: Ctest
> Priority: Major
> Fix For: 3.4.0
>
> Attachments: HADOOP-17011-001.patch, HADOOP-17011-002.patch,
> HADOOP-17011-003.patch, HADOOP-17011-004.patch, HADOOP-17011-005.patch
>
>
> *Problem:*
> Currently, `getDefaultUri` is using `conf.get` to get the value of
> `fs.defaultFS`, which means that the trailing whitespace after a valid URI
> won’t be removed and could stop namenode and datanode from starting up.
>
> *How to reproduce (Hadoop-2.8.5):*
> Set the configuration
> {code:java}
> <property>
> <name>fs.defaultFS</name>
> <value>hdfs://localhost:9000 </value>
> </property>{code}
> In core-site.xml (there is a whitespace after 9000) and start HDFS.
> Namenode and datanode won’t start and the log message is:
> {code:java}
> 2020-04-23 11:09:48,198 ERROR
> org.apache.hadoop.hdfs.server.namenode.NameNode: Failed to start namenode.
> java.lang.IllegalArgumentException: Illegal character in authority at index
> 7: hdfs://localhost:9000
> at java.net.URI.create(URI.java:852)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.setClientNamenodeAddress(NameNode.java:440)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:897)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:885)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1626)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1694)
> Caused by: java.net.URISyntaxException: Illegal character in authority at
> index 7: hdfs://localhost:9000
> at java.net.URI$Parser.fail(URI.java:2848)
> at java.net.URI$Parser.parseAuthority(URI.java:3186)
> at java.net.URI$Parser.parseHierarchical(URI.java:3097)
> at java.net.URI$Parser.parse(URI.java:3053)
> at java.net.URI.<init>(URI.java:588)
> at java.net.URI.create(URI.java:850)
> ... 5 more
> {code}
>
> *Solution:*
> Use `getTrimmed` instead of `get` for `fs.defaultFS`:
> {code:java}
> public static URI getDefaultUri(Configuration conf) {
> URI uri =
> URI.create(fixName(conf.getTrimmed(FS_DEFAULT_NAME_KEY, DEFAULT_FS)));
> if (uri.getScheme() == null) {
> throw new IllegalArgumentException("No scheme in default FS: " + uri);
> }
> return uri;
> }
> {code}
> I have submitted a patch for trunk about this.
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