As an addendum to this post: I installed neo4j community edition version 3.4.0 on an AWS EC2 (Linux) instance, and did not get the ServiceUnavailable error as above. The error occurred on my MacBook Pro macos 10.13.4
Colin Goldberg On Thursday, May 24, 2018 at 4:20:38 PM UTC-4, Colin Goldberg wrote: > > Hi, > > I recently created a sandbox instance (blank) so I could test > https://guides.neo4j.com/wiki. > > Using https://guides.neo4j.com/wiki, I had success running the first > cypher statement to populate the graph with Wikipedia categories. However, > the second cypher statement produces an error - after running for a few > seconds. > > Here's the statement: > UNWIND range(0,4) as level > CALL apoc.cypher.doIt(" > MATCH (c:Category { pagesFetched: false, level: $level }) > CALL apoc.load.json(' > https://en.wikipedia.org/w/api.php?format=json&action=query&list=categorymembers&cmtype=page&cmtitle=Category:' > > + apoc.text.urlencode(c.catName) + '&cmprop=ids%7Ctitle&cmlimit=500') > YIELD value as results > UNWIND results.query.categorymembers AS page > MERGE (p:Page {pageId: page.pageid}) > ON CREATE SET p.pageTitle = page.title, p.pageUrl = ' > http://en.wikipedia.org/wiki/' + apoc.text.urlencode(replace(page.title, > ' ', '_')) > WITH p,c > MERGE (p)-[:IN_CATEGORY]->(c) > WITH DISTINCT c > SET c.pagesFetched = true", { level: level }) YIELD value > RETURN value > > And here's the error message: > Error ServiceUnavailable > WebSocket connection failure. Due to security constraints in your web > browser, the reason for the failure is not available to this Neo4j Driver. > Please use your browsers development console to determine the root cause of > the failure. Common reasons include the database being unavailable, using > the wrong connection URL or temporary network problems. If you have enabled > encryption, ensure your browser is configured to trust the certificate > Neo4j is configured to use. WebSocket `readyState` is: 3 > > The js console shows error message: neo4j-web.min.js:20 WebSocket is > already in CLOSING or CLOSED state. > > I posted this on the neoj4 Slack channel - any help is appreciated. > > Thanks > > Colin Goldberg > > > -- You received this message because you are subscribed to the Google Groups "Neo4j" group. To unsubscribe from this group and stop receiving emails from it, send an email to neo4j+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
