[Neo4j] Neo4j 1.2 server on Linux X86 - 64 bit

Joshi Hemant - hjoshi Hemant.Joshi at acxiom.com
Tue Feb 1 23:55:44 CET 2011


I solved it!! The jar file needed to be in the plugins folder.
-Hemant

-----Original Message-----
From: user-bounces at lists.neo4j.org [mailto:user-bounces at lists.neo4j.org] On Behalf Of Joshi Hemant - hjoshi
Sent: Tuesday, February 01, 2011 4:50 PM
To: Neo4j user discussions
Subject: Re: [Neo4j] Neo4j 1.2 server on Linux X86 - 64 bit

I could create OldIndex plugin to read index created using 0.8 snapshot of REST server and made entry for the plugin in the org.neo4j.server.plugins.ServerPlugin as follows:
org.neo4j.examples.server.plugins.OldIndex
The code for OldIndex is very straight forward :

@Name( "getNodes" )
    @Description( "Get all nodes from the lucene index" )
    @PluginTarget( GraphDatabaseService.class )
    public Iterable<Node> getAllNodes( @Source GraphDatabaseService graphDb,
    		@Description( "The key to search old lucene index with" ) @Parameter( name = "key" ) String key,
    		@Description( "The value to search old lucene index with" ) @Parameter( name = "value" ) String value)
    {
    	IndexService ind = new LuceneReadOnlyIndexService(graphDb);
      IndexHits<Node> nodeHits = ind.getNodes(key, value);
    	return nodeHits;
    }

When I post to URL http://localhost:7474/db/data/ext/OldIndex/graphdb/getNodes with key as name and value as "JOHN DOE", I should get a single node back as it was indexed and accessible earlier through old 0.8 REST snapshot. 

According to wrapper.log file, the request was handled and returned with 200 HTTP code. 

INFO   | jvm 1    | 2011/02/01 16:38:46 | [org.mortbay.log] : REQUEST /db/data/ext/OldIndex/graphdb/getNodes on org.mortbay.jetty.HttpConnection at 124e935
INFO   | jvm 1    | 2011/02/01 16:38:46 | [org.mortbay.log] : sessionManager=org.mortbay.jetty.servlet.HashSessionManager at 14b5f4a
INFO   | jvm 1    | 2011/02/01 16:38:46 | [org.mortbay.log] : session=null
INFO   | jvm 1    | 2011/02/01 16:38:46 | [org.mortbay.log] : servlet=org.neo4j.server.web.NeoServletContainer-19297865
INFO   | jvm 1    | 2011/02/01 16:38:46 | [org.mortbay.log] : chain=null
INFO   | jvm 1    | 2011/02/01 16:38:46 | [org.mortbay.log] : servlet holder=org.neo4j.server.web.NeoServletContainer-19297865
INFO   | jvm 1    | 2011/02/01 16:38:46 | [org.mortbay.log] : RESPONSE /db/data/ext/OldIndex/graphdb/getNodes  200
INFO   | jvm 1    | 2011/02/01 16:38:46 | [org.mortbay.log] : EOF

But there were no results returned.
The question is: how does one access old lucene index created with 0.8 snapshot in the new 1.2 server plugin framework?
-Hemant

-----Original Message-----
From: user-bounces at lists.neo4j.org [mailto:user-bounces at lists.neo4j.org] On Behalf Of Peter Neubauer
Sent: Thursday, January 27, 2011 4:43 PM
To: Neo4j user discussions
Subject: Re: [Neo4j] Neo4j 1.2 server on Linux X86 - 64 bit

Joshi,
you can see the process here,
http://docs.neo4j.org/chunked/snapshot/server-plugins.html, and and an
example under neo4j-examples (part of the server distribution) under
/examples/java/site/server-plugins.html that links to the local
example code.

Let me know if you encounter problems, and I will try to help you!

Cheers,

/peter neubauer

GTalk:      neubauer.peter
Skype       peter.neubauer
Phone       +46 704 106975
LinkedIn   http://www.linkedin.com/in/neubauer
Twitter      http://twitter.com/peterneubauer

http://www.neo4j.org               - Your high performance graph database.
http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party.



On Thu, Jan 27, 2011 at 10:06 AM, Joshi Hemant - hjoshi
<Hemant.Joshi at acxiom.com> wrote:
> I can write a java program if it is straight forward process. Otherwise, I will have to wait.
> -Hemant
>
> -----Original Message-----
> From: user-bounces at lists.neo4j.org [mailto:user-bounces at lists.neo4j.org] On Behalf Of Peter Neubauer
> Sent: Thursday, January 27, 2011 10:35 AM
> To: Neo4j user discussions
> Subject: Re: [Neo4j] Neo4j 1.2 server on Linux X86 - 64 bit
>
> Joshi,
> would it be possible for you to write that extension? Otherwise, I can
> try to power it through one of these days :/
>
> Cheers,
>
> /peter neubauer
>
> GTalk:      neubauer.peter
> Skype       peter.neubauer
> Phone       +46 704 106975
> LinkedIn   http://www.linkedin.com/in/neubauer
> Twitter      http://twitter.com/peterneubauer
>
> http://www.neo4j.org               - Your high performance graph database.
> http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party.
>
>
>
> On Thu, Jan 27, 2011 at 8:08 AM, Joshi Hemant - hjoshi
> <Hemant.Joshi at acxiom.com> wrote:
>> I do not think I have an options of updating index to new provider framework using REST or java. I think an extension would make updating to latest release much easier for us.
>> -Hemant
>>
>> -----Original Message-----
>> From: user-bounces at lists.neo4j.org [mailto:user-bounces at lists.neo4j.org] On Behalf Of Peter Neubauer
>> Sent: Wednesday, January 26, 2011 11:59 PM
>> To: Neo4j user discussions
>> Subject: Re: [Neo4j] Neo4j 1.2 server on Linux X86 - 64 bit
>>
>> Joshi,
>> the current REST API exposes the new Indexes that you can create on
>> nodes and relatoinships. The old indexes (that your DB probably is
>> indexed with) are not exposed via the Server REST API.
>>
>> I would suggest to reindex your data using either the current REST
>> API, http://components.neo4j.org/neo4j-server/snapshot/rest.html#Add_indices_with_provided_configuration_parameters
>>
>>  or in Java code http://wiki.neo4j.org/content/Index_Framework or
>>
>> Is that possible for you? Otherwise we would need to find another
>> solution, or write an extension that provides access to the old index
>> API, since this has come up repeatedly now.
>>
>> Cheers,
>>
>> /peter neubauer
>>
>> GTalk:      neubauer.peter
>> Skype       peter.neubauer
>> Phone       +46 704 106975
>> LinkedIn   http://www.linkedin.com/in/neubauer
>> Twitter      http://twitter.com/peterneubauer
>>
>> http://www.neo4j.org               - Your high performance graph database.
>> http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party.
>>
>>
>>
>> On Wed, Jan 26, 2011 at 8:53 PM, Joshi Hemant - hjoshi
>> <Hemant.Joshi at acxiom.com> wrote:
>>> Thanks Peter. You were right. Changing those 2 entries did solve the problem of connecting to the webadmin UI as well as getting json document back for simple requests such as
>>>
>>> curl -H Accept:application/json http://gigdev8028.gig.acxiom.net:9999/db/data/node/1
>>>
>>> Here are the 2 issues that are still puzzling to me.
>>> 1) Though I have put the 2 aforementioned settings in neo4j.properties file under conf folder (attached), I was still able to create a new node without problems and could get json document back for the new node as well.
>>>
>>> 2) When I pointed neo4j 1.2 server to my old neo4j-rest-db directory, I could access all nodes, relationships as well properties etc. online through webadmin as well as json requests but I am not able to access the lucene index I have created on this data. I have several nodes I have indexed in the old version that I would like to access using 1.2 but when I try to get to http://gigdev8028.gig.acxiom.net:9999/db/data/index/node
>>>
>>> So far I get no response (no error either) I have attached neo4j.log and wrapper.log if that helps.
>>> Thanks for your help.
>>> -Hemant
>>>
>>> -----Original Message-----
>>> From: user-bounces at lists.neo4j.org [mailto:use r-bounces at lists.neo4j.org] On Behalf Of Peter Neubauer
>>> Sent: Tuesday, January 25, 2011 9:27 PM
>>> To: Neo4j user discussions
>>> Subject: Re: [Neo4j] Neo4j 1.2 server on Linux X86 - 64 bit
>>>
>>> Joshi,
>>> I am a bit suspicious of your wrapper.log,
>>>
>>> STATUS | wrapper  | 2011/01/24 11:34:47 | Launching a JVM...
>>> INFO   | jvm 1    | 2011/01/24 11:34:47 | WrapperManager: Initializing...
>>> INFO   | jvm 1    | 2011/01/24 11:34:47 | WrapperManager:
>>> INFO   | jvm 1    | 2011/01/24 11:34:47 | WrapperManager: WARNING -
>>> Unable to load the Wrapper's native library because none of the
>>> INFO   | jvm 1    | 2011/01/24 11:34:47 | WrapperManager:
>>> following files:
>>> INFO   | jvm 1    | 2011/01/24 11:34:47 | WrapperManager:
>>> libwrapper-linux-x86-64.so
>>> INFO   | jvm 1    | 2011/01/24 11:34:47 | WrapperManager:
>>> libwrapper.so
>>> INFO   | jvm 1    | 2011/01/24 11:34:47 | WrapperManager:
>>> could be located on the following java.library.path:
>>> INFO   | jvm 1    | 2011/01/24 11:34:47 | WrapperManager:
>>> /home/hjoshi/neo4j-1.2/bin/lib
>>> INFO   | jvm 1    | 2011/01/24 11:34:47 | WrapperManager:
>>> Please see the documentation for the wrapper.java.library.path
>>> INFO   | jvm 1    | 2011/01/24 11:34:47 | WrapperManager:
>>> configuration property.
>>> INFO   | jvm 1    | 2011/01/24 11:34:47 | WrapperManager:
>>> System signals will not be handled correctly.
>>>
>>> but that should not be fatal.
>>>
>>> It seems you are accessing the webadmin from outside localhost with
>>> the external name? In that case, you should tell the external address
>>> in the conf/neo4j-server.properties:
>>>
>>> # REST endpoint for the data API
>>> # Note the / in the end is mandatory
>>> org.neo4j.server.webadmin.data.uri=http://localhost:7474/db/data/
>>>
>>> # REST endpoint of the administration API (used by Webadmin)
>>> org.neo4j.server.webadmin.management.uri=http://localhost:7474/db/manage/
>>>
>>> should be changed to
>>>
>>> # REST endpoint for the data API
>>> # Note the / in the end is mandatory
>>> org.neo4j.server.webadmin.data.uri=http://gigdev8028.gig.acxiom.net:7474/db/data/
>>>
>>> # REST endpoint of the administration API (used by Webadmin)
>>> org.neo4j.server.webadmin.management.uri=http://gigdev8028.gig.acxiom.net:7474/db/manage/
>>>
>>> Does that change things for the webadmin?
>>>
>>> Cheers,
>>>
>>> /peter neubauer
>>>
>>> GTalk:      neubauer.peter
>>> Skype       peter.neubauer
>>> Phone       +46 704 106975
>>> LinkedIn   http://www.linkedin.com/in/neubauer
>>> Twitter      http://twitter.com/peterneubauer
>>>
>>> http://www.neo4j.org               - Your high performance graph database.
>>> http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party.
>>>
>>>
>>>
>>> On Sat, Jan 22, 2011 at 9:08 AM, Peter Neubauer
>>> <peter.neubauer at neotechnology.com> wrote:
>>>> Joshi,
>>>> Could youy send over the contents of the log files under data/log to
>>>> me in order to take a look?
>>>>
>>>> /peter
>>>>
>>>> On Friday, January 21, 2011, Joshi Hemant - hjoshi
>>>> <Hemant.Joshi at acxiom.com> wrote:
>>>>> I downloaded Neo4j 1.2 release for linux from http://neo4j.org/get?file=neo4j-1.2-unix.tar.gz and extracted it to a directory using tar -zxvf <file>. I installed the service using bin/neo4j install option. Next, I followed documentation at http://wiki.neo4j.org/content/Getting_Started_With_Neo4j_Server. After the neo4j server is started successfully, when I try the curl command
>>>>> curl -H Accept:application/json http://localhost:7474/db/data/
>>>>>
>>>>> I get the following response:
>>>>> <HTML>
>>>>> <HEAD><TITLE>Redirection</TITLE></HEAD>
>>>>> <BODY><H1>Redirect</H1></BODY>
>>>>>
>>>>> Also from firefox, when I try to access webadmin at http://gigdev8028.gig.acxiom.net:7474/webadmin/
>>>>> I get the following error message:
>>>>> Server connection lost
>>>>> Attempting to re-establish connection..
>>>>>
>>>>> I have not changed any config files. uname-a command returns the following:
>>>>> 2.6.18-194.el5 #1 SMP Tue Mar 16 21:52:39 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
>>>>>
>>>>> The 2 log files neo4j.log and wrapper.log under data/log directory do not show any error messages.
>>>>>
>>>>> Am I missing something?
>>>>> -Hemant
>>>>> ***************************************************************************
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