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Akira Ajisaka commented on HADOOP-14586: ---------------------------------------- Thanks. I'm thinking we can easily fix this in 2.7.4. > org.apache.hadoop.util.Shell causes failure in <clinit> on Java 9 RC build, > leading to almost all of Hadoop failing (next one StringUtils) > ------------------------------------------------------------------------------------------------------------------------------------------- > > Key: HADOOP-14586 > URL: https://issues.apache.org/jira/browse/HADOOP-14586 > Project: Hadoop Common > Issue Type: Bug > Components: common > Affects Versions: 2.7.2 > Environment: Java 9, build 175 (Java 9 release candidate as of June > 25th, 2017) > Reporter: Uwe Schindler > Assignee: Akira Ajisaka > Priority: Critical > Labels: Java9 > > You cannot use any Hadoop component anymore with the latest release candidate > build of Java 9, because it fails with an StringIndexOutOfBoundsException in > {{org.apache.hadoop.util.Shell#<clinit>}}. This leads to a whole cascade of > failing classes (next in chain is StringUtils). > The reason is that the release candidate build of Java 9 no longer has "-ea" > in the version string and the system property "java.version" is now simply > "9". This causes the following line to fail fatally: > {code:java} > private static boolean IS_JAVA7_OR_ABOVE = > System.getProperty("java.version").substring(0, 3).compareTo("1.7") >= > 0; > {code} > Analysis: > - This code looks wrong, as comparing a version this way is incorrect. > - The {{substring(0, 3)}} is completely useless, {{compareTo}} also works > without it, although it is still an invalid way to compare a version. > Maybe look at Lucene's source code (Constants.java) to have a better way in > doing this! Sorry this is incredible to me! Hardcoding string bounds into a > static initializer that are applied on a string that you have no control of... > This issue breaks Apache Solr from working with Java 9, so I set it to > "critical". We have to disable the whole Hadoop integration once Java 9 is > detected. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org