I have recently set up a JDBC driver to connect to hdfs using Apache Phoenix. 
Basic queries on Squirrel have worked well (for example, "select * from 
datafile"), but as soon as I ask a slightly more complicated query (ie, "select 
column1 from datafile where column2 = 'filter1'", I encounter this error:
org.apache.phoenix.exception.PhoenixIOException: Task
org.apache.phoenix.job.JobManager$InstrumentedJobFutureTask rejected from
org.apache.phoenix.job.JobManager[Running, pool size = 128, active threads =
128, queued tasks = 5000, completed tasks = 5132]
>From some searching, it seems that I should increase the ThreadPoolSize in the 
>Apache Phoenix hbase.xml configuration file in order to avoid this error, 
>which I have done, increasing it from 128 to 512. However, it does not seem to 
>have noticed this change. The error persists and the "pool size" is still 
>given as 128 within the error.
On the Phoenix Driver settings in Squirrel, I have indicated the location of 
hbase and hdfs directories containing the .xml config files under "Extra Class 
Path" in setup.
Is there any way to make the driver "notice" that the ThreadPoolSize has 
changed?
Thank you!


-----
Megan McClarty
Process Engineer 2 | Lam Research
E-mail<mailto:megan.mccla...@lamresearch.com> | 
LinkedIn<https://www.linkedin.com/in/meganmcclarty>

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