Loading multiple pipelines from yaml creates different instances of QdranDocumentStore for each pipeline

[RajanMehta]

I have two pipelines defined in YAML: 1. query_pipeline 2. indexing_pipeline.

indexing_pipeline saves data to the document store. Now, when I run the query_pipeline, it doesn't have access to the indexed data.

Seems like "Store" component of query_pipeline (retriever) and "Store" component of indexing_pipeline are different instances.

I was able to fix the issue with this hack:

document_store = pipelines["indexing_pipeline"].get_document_store()
retriever = pipelines["query_pipeline"].get_node("Retriever")
retriever.document_store = document_store

Notebook to reproduce the issue: https://colab.research.google.com/drive/1MTk2VEmi3LjkavpKEhG9IHIAUeNFGOnJ?usp=sharing

[RajanMehta]

I guess this is only happening with ":memory:" location. The pipelines are working fine with "localhost"