Bryan is correct about the backing library reading everything into memory to do the evaluation.

Might I ask what the expression you are using?

On Thu, Sep 24, 2015 at 6:44 PM, Adam Williams <aaronfwilliams@outlook.com> wrote:
I tried it even with 6GB and no luck.  It's receiving the flowfiles, but nothing is happening after.  If i do it with a small subset (3 JSON objects) it works perfect.  When i throw the 180MB file it just spins, no logging, errors etc very odd.  Any thoughts?

Thanks


From: aaronfwilliams@outlook.com
To: users@nifi.apache.org
Subject: RE: Array into MongoDB
Date: Thu, 24 Sep 2015 21:23:35 +0000


Bryan,

I think that is whats happening, fans spinning like crazy, this is my current bootstrap.conf.  I will bump it up, are there any other settings i should bump too?

java.arg.2=-Xms512m

java.arg.3=-Xmx2048m


Thanks


Date: Thu, 24 Sep 2015 17:20:27 -0400
Subject: Re: Array into MongoDB
From: bbende@gmail.com
To: users@nifi.apache.org

One other thing I thought of... I think the JSON processors read the entire FlowFile content into memory to do the splitting/evaluating, so I wonder if you are running into a memory issue with a 180MB JSON file.

Are you running with the default configuration of 512mb set in conf/bootstrap.conf ?  If so it would be interesting to see what happens if you bump that up.

On Thu, Sep 24, 2015 at 5:06 PM, Bryan Bende <bbende@gmail.com> wrote:
Adam,

Based on that message I suspect that MongoDB does not support sending in an array of documents since it looks like it expect the first character to be the start of a document and not an array.

With regards to the SplitJson processor, if you set the JSON Path to $ then it should split at the top-level and send out each of your two documents on the splits relationship.

-Bryan


On Thu, Sep 24, 2015 at 4:36 PM, Adam Williams <aaronfwilliams@outlook.com> wrote:
I have an array of JSON object I am trying to put into Mongo, but I keep hitting this on the PutMongo processor:

ERROR [Timer-Driven Process Thread-1] o.a.nifi.processors.mongodb.PutMongo PutMongo[id=c576f8cc-6e21-4881-a7cd-6e3881838a91] Failed to insert StandardFlowFileRecord[uuid=2c670a40-7934-4bc6-b054-1cba23fe7b0f,claim=StandardContentClaim [resourceClaim=StandardResourceClaim[id=1443125646319-1, container=default, section=1], offset=0, length=208380820],offset=0,name=test.json,size=208380820] into MongoDB due to org.bson.BsonInvalidOperationException: readStartDocument can only be called when CurrentBSONType is DOCUMENT, not when CurrentBSONType is ARRAY.: org.bson.BsonInvalidOperationException: readStartDocument can only be called when CurrentBSONType is DOCUMENT, not when CurrentBSONType is ARRAY.



I tried to use the splitJson processor to split the array into segments, but to my experience I can't pull out each Json Obect.  The splitjson processor just hangs and never produces logs or any output at all.  The structure of my data is:


[{"id":1, "stat":"something"},{"id":2, "stat":"anothersomething"}]


The JSON file itself is pretty large (>100mb).


Thank you