Peter Bacsko created MAPREDUCE-7052: ---------------------------------------
Summary: TestFixedLengthInputFormat#testFormatCompressedIn is flaky Key: MAPREDUCE-7052 URL: https://issues.apache.org/jira/browse/MAPREDUCE-7052 Project: Hadoop Map/Reduce Issue Type: Bug Components: client, test Reporter: Peter Bacsko Assignee: Peter Bacsko Sometimes the test case TestFixedLengthInputFormat#testFormatCompressedIn can fail with the following error: {noformat} java.lang.OutOfMemoryError: Requested array size exceeds VM limit at org.apache.hadoop.mapred.TestFixedLengthInputFormat.runRandomTests(TestFixedLengthInputFormat.java:322) at org.apache.hadoop.mapred.TestFixedLengthInputFormat.testFormatCompressedIn(TestFixedLengthInputFormat.java:90) {noformat} *Root cause:* under special circumstances, the following line can return a huge number: {noformat} // Test a split size that is less than record len numSplits = (int)(fileSize/Math.floor(recordLength/2)); {noformat} For example, let {{seed}} be 2026428718. This causes {{recordLength}} to be 1 at iteration 19. {{Math.floor()}} returns negative Infinity, which becomes positve infinity after the divison. Casting it to {{int}} yields {{Integer.MAX_VALUE}}. Eventually we get an OOME because the test wants to create a huge {{InputSplit}} array. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: mapreduce-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: mapreduce-issues-h...@hadoop.apache.org