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Posted to common-issues@hadoop.apache.org by "Steve Loughran (Jira)" <ji...@apache.org> on 2020/07/15 16:56:00 UTC
[jira] [Commented] (HADOOP-17130) Configuration.getValByRegex()
shouldn't update the results while fetching.
[ https://issues.apache.org/jira/browse/HADOOP-17130?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17158531#comment-17158531 ]
Steve Loughran commented on HADOOP-17130:
-----------------------------------------
I believe it is in {{updatePropertiesWIthDeprecatedKeys()}} because that does update the map
{code}
private void updatePropertiesWIthDeprecatedKeys(
DeprecationContext deprecations, String[] newNames) {
for (String newName : newNames) {
String deprecatedKey = deprecations.getReverseDeprecatedKeyMap().get(newName);
if (deprecatedKey != null && !getProps().containsKey(newName)) {
String deprecatedValue = getProps().getProperty(deprecatedKey);
if (deprecatedValue != null) {
getProps().setProperty(newName, deprecatedValue); /* HERE */
}
}
}
}
{code}
> Configuration.getValByRegex() shouldn't update the results while fetching.
> --------------------------------------------------------------------------
>
> Key: HADOOP-17130
> URL: https://issues.apache.org/jira/browse/HADOOP-17130
> Project: Hadoop Common
> Issue Type: Bug
> Components: common
> Affects Versions: 3.1.3
> Reporter: Mukund Thakur
> Assignee: Mukund Thakur
> Priority: Major
>
> We have seen this stacktrace while using ABFS file system. After analysing the stack trace we can see that getValByRegex() is reading the properties and substituting the value in the same call. This may cause the ConcurrentModificationException.
> {code:java}
> Caused by: java.util.concurrent.ExecutionException: java.util.ConcurrentModificationException at java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.util.concurrent.FutureTask.get(FutureTask.java:192) at org.apache.hadoop.hive.ql.io.orc.OrcInputFormat.generateSplitsInfo(OrcInputFormat.java:1877) ... 18 more Caused by: java.util.ConcurrentModificationException at java.util.Hashtable$Enumerator.next(Hashtable.java:1387) at org.apache.hadoop.conf.Configuration.getValByRegex(Configuration.java:3855) at org.apache.hadoop.fs.azurebfs.AbfsConfiguration.validateStorageAccountKeys(AbfsConfiguration.java:689) at org.apache.hadoop.fs.azurebfs.AbfsConfiguration.<init>(AbfsConfiguration.java:237) at org.apache.hadoop.fs.azurebfs.AzureBlobFileSystemStore.<init>(AzureBlobFileSystemStore.java:154) at org.apache.hadoop.fs.azurebfs.AzureBlobFileSystem.initialize(AzureBlobFileSystem.java:113) at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:3396) at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:158) at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:3456) at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:3424) at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:518) at org.apache.hadoop.fs.Path.getFileSystem(Path.java:361)
>
> {code}
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