I figured out the solution and Microsoft and not Solr is the problem here :):
I downloaded and build latest Solr (3.4) from sources and finally hit following
line of code in Solr (where I put my debug statement) :
if(url != null){
LOG.info("Yavar: getting handle to driver manager:");
c = DriverManager.getConnection(url, initProps);
LOG.info("Yavar: got handle to driver manager:");
}
The call to Driver Manager was not returning. Here was the error!! The Driver
we were using was Microsoft Type 4 JDBC driver for SQL Server. I downloaded
another driver called jTDS jDBC driver and installed that. Problem got fixed!!!
So please follow the following steps:
1. Download jTDS jDBC driver from http://jtds.sourceforge.net/
2. Put the driver jar file into your Solr/lib directory where you had put
Microsoft JDBC driver.
3. In the data-config.xml use this statement:
driver="net.sourceforge.jtds.jdbc.Driver"
4. Also in data-config.xml mention url like this:
"url="jdbc:jTDS:sqlserver://localhost:1433;databaseName=XXX"
5. Now run your indexing.
It should solve the problem.
-----Original Message-----
From: Husain, Yavar
Sent: Thursday, November 24, 2011 12:38 PM
To: solr-user@lucene.apache.org; Shawn Heisey
Subject: RE: DIH Strange Problem
Hi
Thanks for your replies.
I carried out these 2 steps (it did not solve my problem):
1. I tried setting responseBuffering to adaptive. Did not work.
2. For checking Database connection I wrote a simple java program to connect to
database and fetch some results with the same driver that I use for solr. It
worked. So it does not seem to be a problem with the connection.
Now I am stuck where Tomcat log says: "Creating a connection for entity ....."
and does nothing, I mean after this log we usually get the "getConnection()
took x millisecond" however I dont get that ,I can just see the time moving
with no records getting fetched.
Original Problem listed again:
I am using Solr 1.4.1 on Windows/MS SQL Server and am using DIH for importing
data. Indexing and all was working perfectly fine. However today when I started
full indexing again, Solr halts/stucks at the line "Creating a connection for
entity........." There are no further messages after that. I can see that DIH
is busy and on the DIH console I can see "A command is still running", I can
also see total rows fetched = 0 and total request made to datasource = 1 and
time is increasing however it is not doing anything. This is the exact
configuration that worked for me. I am not really able to understand the
problem here. Also in the index directory where I am storing the index there
are just 3 files: 2 segment files + 1 lucene*****-write.lock file.
...
data-config.xml:
....
<dataSource type="JdbcDataSource"
driver="com.microsoft.sqlserver.jdbc.SQLServerDriver"
url="jdbc:sqlserver://127.0.0.1:1433;databaseName=SampleOrders" user="testUser"
password="password"/>
<document>
.....
.....
Logs:
INFO: Server startup in 2016 ms
Nov 23, 2011 4:11:27 PM org.apache.solr.handler.dataimport.DataImporter
doFullImport
INFO: Starting Full Import
Nov 23, 2011 4:11:27 PM org.apache.solr.core.SolrCore execute
INFO: [] webapp=/solr path=/dataimport params={command=full-import} status=0
QTime=11
Nov 23, 2011 4:11:27 PM org.apache.solr.handler.dataimport.SolrWriter
readIndexerProperties
INFO: Read dataimport.properties
Nov 23, 2011 4:11:27 PM org.apache.solr.update.DirectUpdateHandler2 deleteAll
INFO: [] REMOVING ALL DOCUMENTS FROM INDEX
Nov 23, 2011 4:11:27 PM org.apache.solr.core.SolrDeletionPolicy onInit
INFO: SolrDeletionPolicy.onInit: commits:num=1
commit{dir=C:\solrindexes\index,segFN=segments_6,version=1322041133719,generation=6,filenames=[segments_6]
Nov 23, 2011 4:11:27 PM org.apache.solr.core.SolrDeletionPolicy updateCommits
INFO: newest commit = 1322041133719
Nov 23, 2011 4:11:27 PM org.apache.solr.handler.dataimport.JdbcDataSource$1 call
INFO: Creating a connection for entity SampleText with URL:
jdbc:sqlserver://127.0.0.1:1433;databaseName=SampleOrders
-----Original Message-----
From: Shawn Heisey [mailto:s...@elyograg.org]
Sent: Wednesday, November 23, 2011 7:36 PM
To: solr-user@lucene.apache.org
Subject: Re: DIH Strange Problem
On 11/23/2011 5:21 AM, Chantal Ackermann wrote:
> Hi Yavar,
>
> my experience with similar problems was that there was something wrong
> with the database connection or the database.
>
> Chantal
It's also possible that your JDBC driver might be trying to buffer the
entire result set. There's a link on the wiki specifically for this
problem on MS SQL server. Hopefully it's that, but Chantal could be
right too.
http://wiki.apache.org/solr/DataImportHandlerFaq
Here's the URL to the specific paragraph, but it's likely that it won't
survive the email trip in a clickable form:
http://wiki.apache.org/solr/DataImportHandlerFaq#I.27m_using_DataImportHandler_with_MS_SQL_Server_database_with_sqljdbc_driver._DataImportHandler_is_going_out_of_memory._I_tried_adjustng_the_batchSize_values_but_they_don.27t_seem_to_make_any_difference._How_do_I_fix_this.3F
Thanks,
Shawn
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