[jira] [Created] (ARTEMIS-872) On extremely large volumes, Artemis falsely reports "Storage usage is beyond max-disk-usage"

["Laurent Gauthier (JIRA)" <ji...@apache.org>]

Laurent Gauthier created ARTEMIS-872:
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             Summary: On extremely large volumes, Artemis falsely reports "Storage usage is beyond max-disk-usage"
                 Key: ARTEMIS-872
                 URL: https://issues.apache.org/jira/browse/ARTEMIS-872
             Project: ActiveMQ Artemis
          Issue Type: Bug
          Components: Broker
    Affects Versions: 1.5.0
            Reporter: Laurent Gauthier


On Amazon EFS (Elastic File System) Java 8 reports the following for UsableSpace and TotalSpace:

usable=9,223,372,036,635,623,424
total=   -9,223,372,036,854,775,808

As one can see, the totalSpace is negative! We are past the Long.MAX_VALUE. This results in org.apache.activemq.artemis.core.server.files.FileStoreMonitor reporting an error of type "Storage usage is beyond max-disk-usage" since it computes usage (in method calculateUsage(FileStore store)) as:

1.0 - (double) store.getUsableSpace() / (double) store.getTotalSpace();

so that "usage > maxUsage" resolves to True (maxUsage = 0.999 by default).

This problem was already reported and discussed for ActiveMQ 5.x (see External Issue URL) and a proposed fix was to use the following logic:

if (totalSpace < 0) {
	totalSpace = Long.MAX_VALUE;
	} 

The other proposal is to support a flag would disable the usage check altogether.



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