Release Notes

Apache Phoenix 4.14.1 is available with CDH 5.16.2.

Starting with CDH 5.16.2, Apache Phoenix 4.14.1 parcel can be installed and used with CDH. You can now download and install the Phoenix parcel on CDH 5.16.2.

Known Issues

Potential deadlock on region opening with secondary index recovery

Distributed deadlock happens in clusters with a moderate number of regions for the data tables, secondary index tables.

Products affected: Phoenix

Releases affected:Phoenix 4.14.1 parcel

User affected: Users of Phoenix with secondary indexes

Severity (Low/Medium/High): Medium

Impact: Deadlock on region opening

Immediate action required/workaround:

Make the following configuration changes in HBase:

1) Set hbase.master.startup.retainassign to false

2) Increase the value of hbase.regionserver.executor.openregion.threads and restart cluster should bring up cluster.

If you continue to encounter issues, tune the following assignment manager parameters to match the count of regions for faster assignments:

  • hbase.assignment.threads.max
  • hbase.master.namespace.init.timeout
  • hbase.master.wait.on.regionservers.mintostart
  • hbase.bulk.assignment.threshold.regions
  • hbase.bulk.assignment.threshold.servers

Unsupported Features

The following upstream Apache Phoenix 4.14.1 features are currently not supported in the Cloudera parcel of Phoenix:

  • Hive, Pig, Flume, Kafka and MapReduce integration
  • Phoenix Query Server
  • Cross-row and cross-table transaction support