ConfX created HDFS-17100:
----------------------------
Summary: Group.GroupCacheLoader does not properly throw Exception
with message
Key: HDFS-17100
URL: https://issues.apache.org/jira/browse/HDFS-17100
Project: Hadoop HDFS
Issue Type: Bug
Reporter: ConfX
Attachments: reproduce.sh
h2. What happened?
Got an {{IllegalArgumentException}} without message enclosed in
{{ExceptionInInitializerError}} when trying to
h2. Where's the bug?
In the constructor of {{Group.GroupCacheLoader}} it attempts to instantiate a
{{{}ThreadPoolExecutor{}}}:
{noformat}
ThreadPoolExecutor parentExecutor = new ThreadPoolExecutor(
reloadGroupsThreadCount,
reloadGroupsThreadCount,
60,
TimeUnit.SECONDS,
new LinkedBlockingQueue<>(),
threadFactory);{noformat}
The parameters here can be invalid, e.g., {{{}reloadGroupsthreadCount < 0{}}}.
However, {{ThreadPoolExecutor}} does not throw any exception with debugging
information and {{GroupCacheLoader}} also does not handle the exception
properly by adding instructions.
h2. How to reproduce?
(1) set {{hadoop.security.groups.cache.background.reload}} to {{true}} and
{{hadoop.security.groups.cache.background.reload.threads}} to {{-781297741}}
(2) run
{{org.apache.hadoop.hdfs.TestDataTransferProtocol#testDataTransferProtocol}}
h2. Stacktrace
{noformat}
java.lang.ExceptionInInitializerError
at
org.apache.hadoop.hdfs.MiniDFSCluster.initNameNodeConf(MiniDFSCluster.java:1268)
at
org.apache.hadoop.hdfs.MiniDFSCluster.configureNameService(MiniDFSCluster.java:1089)
at
org.apache.hadoop.hdfs.MiniDFSCluster.createNameNodesAndSetConf(MiniDFSCluster.java:1016)
at
org.apache.hadoop.hdfs.MiniDFSCluster.initMiniDFSCluster(MiniDFSCluster.java:948)
at org.apache.hadoop.hdfs.MiniDFSCluster.<init>(MiniDFSCluster.java:576)
at
org.apache.hadoop.hdfs.MiniDFSCluster$Builder.build(MiniDFSCluster.java:518)
at
org.apache.hadoop.hdfs.TestDataTransferProtocol.testDataTransferProtocol(TestDataTransferProtocol.java:346)
...
Caused by: java.lang.IllegalArgumentException
at
java.base/java.util.concurrent.ThreadPoolExecutor.<init>(ThreadPoolExecutor.java:1293)
at
java.base/java.util.concurrent.ThreadPoolExecutor.<init>(ThreadPoolExecutor.java:1215)
at
org.apache.hadoop.security.Groups$GroupCacheLoader.<init>(Groups.java:285)
at org.apache.hadoop.security.Groups.<init>(Groups.java:139)
at org.apache.hadoop.security.Groups.<init>(Groups.java:102)
at
org.apache.hadoop.security.Groups.getUserToGroupsMappingService(Groups.java:451)
at
org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:338)
at
org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:300)
at
org.apache.hadoop.security.UserGroupInformation.isAuthenticationMethodEnabled(UserGroupInformation.java:395)
at
org.apache.hadoop.security.UserGroupInformation.isSecurityEnabled(UserGroupInformation.java:389)
at org.apache.hadoop.hdfs.server.common.Util.<clinit>(Util.java:77)
...{noformat}
For an easy reproduction, run the reproduce.sh in the attachment. We are happy
to provide a patch if this issue is confirmed.
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