Realize this is a bit late but I ran into you're emails when I encountered the same issue on a my installation of NiFi. I don't know what the too many users message is about but I do know why NiFi gets a null pointer exception. The PutHiveStreaming Processor uses the HiveEndpoint Class to communicate with Hive and when you tell it to auto create partitions it creates a new instance of CliSessionState an extended version of SessionState. This can be seen on line 458 at Unfortunately CliSessionState doesn't set the ip address. If you look at the line in AuthorizationMetaStoreFilterHook mentioned you'll see it's calling getUserIpAddress on a SessionState instance. Since the partition is actually created that error must be occurring afterwards. I'm assuming this a bug but none of this code has been changed in a really long time.
I'm going to try building the Hive Streaming example outside of NiFi and see if it works at all.

On 2018/02/15 17:44:10, Michal Tomaszewski <[EMAIL PROTECTED]> wrote:

> nifi conf directory contains actual Hadoop configuration files: core-site.xml, hbase-site.xml, hdfs-site.xml, hive-site.xml, yarn-site.xml>

> HiveQL queries in NIFI (both SelectHiveQL and PutHiveQL) are working properly and fast.>
> The same error exists when using Hortonworks original 1.5 NiFi compilation installed automatically by Ambari using HDF 3.1 pack.>

> nifi-app.log:>
> 2018-02-15 17:42:29,889 INFO [put-hive-streaming-0] org.apache.hadoop.hive.ql.hooks.ATSHook Created ATS Hook>
> 2018-02-15 17:42:29,889 INFO [put-hive-streaming-0] org.apache.hadoop.hive.ql.log.PerfLogger <PERFLOG from=org.apache.hadoop.hive.ql.Driver>>

> 2018-02-15 17:42:29,890 INFO [put-hive-streaming-0] org.apache.hadoop.hive.ql.log.PerfLogger </PERFLOG start=1518712949889 end=1518712949890 duration=1 from=org.apache.hadoop.hive.ql.Driver>>

> 2018-02-15 17:42:29,890 INFO [put-hive-streaming-0] org.apache.hadoop.hive.ql.Driver Resetting the caller context to>

> 2018-02-15 17:42:29,890 INFO [put-hive-streaming-0] org.apache.hadoop.hive.ql.log.PerfLogger </PERFLOG method=Driver.execute start=1518712949845 end=1518712949890 duration=45 from=org.apache.hadoop.hive.ql.Driver>>

> 2018-02-15 17:42:29,890 INFO [put-hive-streaming-0] org.apache.hadoop.hive.ql.Driver OK>
> 2018-02-15 17:42:29,890 INFO [put-hive-streaming-0] org.apache.hadoop.hive.ql.log.PerfLogger <PERFLOG method=releaseLocks from=org.apache.hadoop.hive.ql.Driver>>

> 2018-02-15 17:42:29,890 INFO [put-hive-streaming-0] o.a.hadoop.hive.ql.lockmgr.DbTxnManager Stopped heartbeat for query: nifi_20180215174229_58046dbe-0af7-41ae-94c4-7bb692053d67>

> 2018-02-15 17:42:29,890 INFO [put-hive-streaming-0] o.a.hadoop.hive.ql.lockmgr.DbLockManager releaseLocks: [lockid:5010336 queryId=nifi_20180215174229_58046dbe-0af7-41ae-94c4-7bb692053d67 txnid:0]>

> 2018-02-15 17:42:29,894 INFO [put-hive-streaming-0] org.apache.hadoop.hive.ql.log.PerfLogger </PERFLOG method=releaseLocks start=1518712949890 end=1518712949894 duration=4 from=org.apache.hadoop.hive.ql.Driver>>

> 2018-02-15 17:42:29,894 INFO [put-hive-streaming-0] org.apache.hadoop.hive.ql.log.PerfLogger </PERFLOG start=1518712949819 end=1518712949894 duration=75 from=org.apache.hadoop.hive.ql.Driver>>

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