MySQL Start fails on Centos serverHy

My httpd service gets started when i manually issue a restart. But the mysql doesnt. The err file is as follows
2014-12-04 18:40:40 9407 [Note] InnoDB: Highest supported file format is Barracuda. 2014-12-04 18:40:40 9407 [Note] InnoDB: The log sequence numbers 6952730092 and 6952730092 in ibdata files do not match the log sequence number 7297651529 in the ib_logfiles! 2014-12-04 18:40:40 9407 [Note] InnoDB: Database was not shutdown normally! 2014-12-04 18:40:40 9407 [Note] InnoDB: Starting crash recovery. 2014-12-04 18:40:40 9407 [Note] InnoDB: Reading tablespace information from the .ibd files... 2014-12-04 18:40:41 9407 [Note] InnoDB: Restoring possible half-written data pages 2014-12-04 18:40:41 9407 [Note] InnoDB: from the doublewrite buffer... 2014-12-04 18:40:41 9407 [Note] InnoDB: 128 rollback segment(s) are active. 2014-12-04 18:40:41 9407 [Note] InnoDB: Waiting for purge to start 2014-12-04 18:40:41 9407 [Note] InnoDB: 5.6.21 started; log sequence number 7297651529 2014-12-04 18:40:41 9407 [Note] Server hostname (bind-address): '*'; port: 3306 2014-12-04 18:40:41 9407 [Note] IPv6 is available. 2014-12-04 18:40:41 9407 [Note] - '::' resolves to '::'; 2014-12-04 18:40:41 9407 [Note] Server socket created on IP: '::'. 2014-12-04 18:40:41 9407 [ERROR] /usr/sbin/mysqld: Error writing file '/var/lib/mysql/newweb.cloudamaze.com.pid' (Errcode: 28 - No space left on device) 2014-12-04 18:40:41 9407 [ERROR] Can't start server: can't create PID file: No space left on device 141204 18:40:41 mysqld_safe Number of processes running now: 0 141204 18:40:41 mysqld_safe mysqld restarted
Tried clearing some files from /tmp. Can i clear the whole directory? Is it because of space issue?