https://issues.apache.org/jira/browse/HIVE-4239
https://issues.apache.org/jira/browse/HIVE-80
I would guess this comment on HIVE-80 is still applicable:
"there may still be some thread-unsafe code, but no one knows for sure.
Given that, the only approach may be to do as much review as possible (e
One more question. If the SemanticAnalyzer isn't fully thread safe could
you provide any pointers as to why it may not be thread safe? It's a 9000
line file so any hints as to where to get started would be much
appreciated. I don't see anything very obvious like globally shared member
variables so
Thanks for all the great insight. I'll poke around a little more to see if I
could at least start documenting the changes required to make everything thread
safe as well as remove the synchronization.
@Xuefu-
I completely understand your points, I was just trying to figure out if there
was a sp
To add,
1. Being public doesn't necessarily guarantee thread-safety. Of course,
this is no excuse for not documenting thread-safety.
2. Sometimes a method is made public for testing, which is bad in my
opnion, but I saw many instances like this before.
--Xuefu
On Thu, Aug 15, 2013 at 1:11 PM,
Interesting, I didn't realize that. If that's the case then I suppose it'd
be really bad for me to circumvent the lock by reproducing the Driver#run
method by calling Driver#compile and Driver#execute directly from within
my app.
If that is the case why make Driver#compile and Driver#execute publ
Well you would have probably found the areas we need to fix! :) The hive
source is is not strict about methods and member visibility. The good news
is that we have been making significant improvements in this aspect.
Brock
On Thu, Aug 15, 2013 at 2:55 PM, Kristopher Glover wrote:
> Interesting,
The hive semantic analyzer is not fully thread safe. We'd like to remove
that lock but it will be a large project.
Brock
On Thu, Aug 15, 2013 at 11:12 AM, Kristopher Glover wrote:
> Hi Everyone,
>
> I'm experiencing a threading issue with the Hive client where I want to
> run multiple queries
Hi Everyone,
I'm experiencing a threading issue with the Hive client where I want to run
multiple queries on the same JVM.
The problem I'm having is that org.apache.hadoop.hive.ql.Driver#run (line 907)
has the following few lines of code :
synchronized (compileMonitor) {
ret = compil
