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https://issues.apache.org/jira/browse/HADOOP-15808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16754144#comment-16754144
]
Steve Loughran commented on HADOOP-15808:
-----------------------------------------
Followup, this isn't enough: token.toString() will raise an exception if
there's any token which doesn't load
{code}
Exception in thread "main" java.lang.NoClassDefFoundError:
org/example/auth/TokenIdentifier
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:370)
at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:404)
at java.util.ServiceLoader$1.next(ServiceLoader.java:480)
at
org.apache.hadoop.security.token.Token.getClassForIdentifier(Token.java:158)
at org.apache.hadoop.security.token.Token.decodeIdentifier(Token.java:185)
at
org.apache.hadoop.hdfs.tools.DelegationTokenFetcher.printTokensToString(DelegationTokenFetcher.java:224)
at
org.apache.hadoop.hdfs.tools.DelegationTokenFetcher.printTokens(DelegationTokenFetcher.java:244)
at
org.apache.hadoop.hdfs.tools.DelegationTokenFetcher$1.run(DelegationTokenFetcher.java:139)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1730)
at
org.apache.hadoop.hdfs.tools.DelegationTokenFetcher.main(DelegationTokenFetcher.java:135)
at
org.apache.hadoop.hdfs.tools.DelegationTokenFetcher.main(DelegationTokenFetcher.java:72)
Caused by: java.lang.ClassNotFoundException:
com.google.cloud.hadoop.fs.gcs.auth.AbstractGCPTokenIdentifier
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 27 more
{code}
> Harden Token service loader use
> -------------------------------
>
> Key: HADOOP-15808
> URL: https://issues.apache.org/jira/browse/HADOOP-15808
> Project: Hadoop Common
> Issue Type: Improvement
> Components: security
> Affects Versions: 2.9.1, 3.1.2
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
> Fix For: 3.1.2, 3.2.1
>
> Attachments: HADOOP-15808-001.patch, HADOOP-15808-002.patch,
> HADOOP-15808-003.patch
>
>
> The Hadoop token service loading (identifiers, renewers...) works provided
> there's no problems loading any registered implementation. If there's a
> classloading or classcasting problem, the exception raised will stop all
> token support working; possibly the application not starting.
> This matters for S3A/HADOOP-14556 as things may not load if aws-sdk isn't on
> the classpath. It probably lurks in the wasb/abfs support too, but things
> have worked there because the installations with DT support there have always
> had correctly set up classpaths.
> Fix: do what we did for the FS service loader. Catch failures to instantiate
> a service provider impl and skip it
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