This site contains release notes for MapR Version 5.0 and below.  You can also refer to the release notes for the latest release.

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General Information

The page Hadoop Compatibility in Version 1.2 could not be found.

New in This Release

This is a maintenance release with no new features.

Resolved Issues

  • (1438) Home directory support
  • (5833) Improve CLDB failover time
  • (5857) Streamline container replication and reporting
  • (5934) Ensure disktab is correct after reboot
  • (6014) Optimize Java garbage collection to mitigate CLDB disruptions
  • (6074) Enhance CLDB exception handling
  • (6140) Improve mfs exception handling
  • (6144) CLDB timeout in M3 reduced to 1 hour on new node (instant on same node)
  • (6166) Add API to blacklist a tasktracker manually
  • (6171) Fixed container stuck offline problem
  • (6198) Corrected overcommit documentation page
  • (6211) Rolling upgrade enhancements
  • (6235) BTree improvements
  • (6273) Fixed getBlockLocations() in MapReduce layer

Known Issues

(Issue 10598)

When a node's IP number is reassigned to another node, remote procedure calls are misdirected to the wrong node. This can result in widespread errors affecting any system that use the RPC binding layer, including container resync operations that never finish or the creation of several superfluous containers. Restart the cluster to clear this condition.

(Issue 11389)

If you use the latest version of any browser to view the MCS, the CLDB, HBase, JobTracker, and job log pages do not load when you click on the respective links. As a workaround, use the following instructions to disable mixed-content-blocking in your browser:
Internet Explorer
Scroll to the bottom of the screen, and click Show all content. The page refreshes and displays mixed content. 

Mozilla Firefox

  1. At the top of the page, to the left of the address bar, click  (the shield icon).
  2. In the pop-up window that appears, click the down arrow next to "Keep Blocking", and select Disable Protection on This Page. The page refreshes and displays mixed content. The shield icon is replaced with a warning symbol to indicate that the page is displaying both secure and non-secure items.

Google Chrome

  1. Click  (the shield icon) on the right side of the address bar.
  2. In the icon dialog box, click Load anyway. The page refreshes and displays mixed content. The URL in the address bar shows https crossed out to indicate that the page is displaying both secure and non-secure items.
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