CODEWITHSUNDEEP
concurrencyneo4jspring-dataneoclipse
First Blood
First Blood

Reputation: 235

Neo4j-Neoclipse Concurrent access issue

I am creating a few nodes in neo4j using spring data, and then I am also accessing them via findByPropertyValue(prop, val).

Everything works correctly when I am reading/writing to the embedded DB using spring data.

Now, as per the Michael Hunger's book : Good Relationship, I opened up Neoclipse in read-only mode connection to my currently active Neo4j connection in Java..

But, it somehow still says that Neo4j's kernel is actively used by some other program or something.

Question 1 :What am I doing wrong here?

Also, I have created a few nodes and persisted them. Whenever I restart the embedded neo4j db, I can view all my nodes when I do findAll().

Question 2 :When I try to visualize all my nodes in Neoclipse(considering the db is accessible), I can only see one single node(which is empty), has no properties associated to it, whereas I have a name property defined.

I started my java app, persisted few nodes, traversed and got the output from in the java console. Now, I shutdown the application and started the Neoclipse IDE, connected to my DB and found that no nodes are present(Problem of Question 2). After trying again(heads down), I go back to my Java app and ran my app, and surprisingly I found that I am getting a Lucene-file-corrupted error(unrecognized file format) error. I had no code changes, I did not delete anything, but still got this error.

Question 3 :Not sure what I am doing wrong. But since I found this discussion on my bug(lucene/concurrent db access), I am willing to know if this is a bug or if this is due to any programatic error.(Does it have to do something with Eclipse Juno)

Any reply would be highly appreciated.

Upvotes: 0

Views: 564

Answers (1)

Aravind Yarram
Aravind Yarram

Reputation: 80166

  1. Make sure you are properly committing the transactions.
  2. Data is not immediately flushed to the disk by Neo4j and hence you might not be viewing the nodes immediately in Neoclipse. I always restart the application that is using Neo4j in embedded mode so that data is flushed to the disk and then open neoclipse.

Posting your code would help us to check for any issues.

Upvotes: 1

Related Questions