I am trying to process solr logs using logstash, but the "solr.log" file contains logs from all the collections, i want log of one particular collection.
Can someone help?
Happy to help but what are you wanting help with? If you give a log file you want I'll be happy to see what I can do.
Thanks for your response 
PFA, in this case, we have more than one collection in the log file.
So I want the lines that has "somecollection1' and the rest should not be processed.
I used if condition in my logstash config file, but that didn't work. Please check the config.png and let me know if you need more input.
Providing the text rather than an image is much more helpful.
I apologize, upload is working only with jpeg and png formats. I tried to upload .txt file, but that did not work.
Here's the sample log
INFO - 2015-11-10 01:32:15.689; org.apache.solr.update.processor.LogUpdateProcessor; [somecollection1_shard2_replica2] webapp=/solr path=/update params={someparams} 0 19
INFO - 2015-11-10 01:32:15.691; org.apache.solr.update.processor.LogUpdateProcessor; [somecollection1_shard2_replica2] webapp=/solr path=/update params={wt=javabin&version=2} 0 46
INFO - 2015-11-10 01:32:15.959; org.apache.solr.update.processor.LogUpdateProcessor; [somecollection2_shard3_replica2] webapp=/solr path=/update params={someparams} {add=[8000297011 0 0
INFO - 2015-11-10 01:32:15.960; org.apache.solr.update.processor.LogUpdateProcessor; [somecollection3_shard1_replica2] webapp=/solr path=/update params={wt=javabin&version=2} 0 5
INFO - 2015-11-10 01:32:16.232; org.apache.solr.update.processor.LogUpdateProcessor; [somecollection3_shard1_replica1] webapp=/solr path=/update params={someparams} 0 0