无法在Windows上启动Neo4j，没有错误消息

Question

I'm using the following on Windows 7:

• neo4j-community-1.9.2
• Java 7 Update 25

I have Windows Firewall disabled.

When I start Neo4j.bat, both as Administrator and normally, I get the following message:

c:\Tools\neo4j\bin>Neo4j.bat 
28/07/13 9:34:27 PM org.neo4j.server.AbstractNeoServer INFO: Setting startup tim 
eout to: 120000ms based on -1

A blank Java console window pops up, no messages, then the window disappears after a minute or so.

When I go to http://localhost:7474/ , I just get a server not found error.

If I try to install it as a service, the service wouldn't start.

Any ideas what I need to do to start Neo4j? I see here that Neo4j 1.9 does support Java 7:

http://blog.neo4j.org/2013/03/neo4j-19m05-released-wrapping-up.html

base.bat correctly points to windows-service-wrapper-5.jar , so not the windows-service-wrapper-*.jar problem that some people have had in the past. It would be helpful if it outputted an error message.

---

I just tried it with neo4j 2.0 milestone, and it didn't make any difference. The Java window pops up with no messages, http://localhost:7474/ gets a server not found error, then the Java window closes after a minute or two.

I added JAVA_HOME and JRE_HOME system variables, made no difference. I think I would get an error if Neo4j was not able to locate Java anyway.

Answer 1

I've fixed it.

With help from Neo4j's Google Group, I looked at the logs in data/logs/*.log and data/graph.db/messages.log , and found the following exception:

Caused by: java.rmi.server.ExportException: Port already in use: 1337; nested exception is:
    java.net.BindException: Address already in use: JVM_Bind

Once I disabled my other service that uses that port, Neo4j's web admin at http://localhost:7474 worked. I then found out port 1337 is used by Neo4j's remote shell, I disabled it by adding enable_remote_shell = false to neo4j.properties , then I was able to have both Neo4j and my other service running.

Answer 2

I'm using the version 2.2.1 community edition of Neo4j on Windows 7, Java 1.8 update 45

In my case the log file messages.log was under default.graphdb directory. In there, you'll see the root cause of the problem.