Lines from crawl.log of job 1 matching the regular expression null

2013-01-03T13:50:30.016Z     1         59 dns:www.netarkivet.dk P http://www.netarkivet.dk/ text/dns #049 20130103135029128+137 sha1:7LMB3DYRXROFYOSWDGMEK7RQTBPJJIXN - content-size:59
2013-01-03T13:50:30.952Z   200         59 http://www.netarkivet.dk/robots.txt P http://www.netarkivet.dk/ text/plain #050 20130103135030335+612 sha1:4JATDZGQWECZ3XNVVBVH6IXOJRHJFYEW - content-size:262
2013-01-03T13:50:32.043Z   301          0 http://www.netarkivet.dk/ - - text/html #050 20130103135031572+466 sha1:3I42H3S6NNFQ2MSVX7XZKYAYSCX5QBYJ - content-size:269,3t
2013-01-03T13:50:32.530Z     1         56 dns:netarkivet.dk RP http://netarkivet.dk/ text/dns #050 20130103135032522+5 sha1:LHI5AHBVJHJBZIELGAPJWMJL2PJYLV5W - content-size:56
2013-01-03T13:50:33.423Z   200         59 http://netarkivet.dk/robots.txt RP http://netarkivet.dk/ text/plain #005 20130103135032845+576 sha1:4JATDZGQWECZ3XNVVBVH6IXOJRHJFYEW - content-size:262
2013-01-03T13:50:35.028Z   200      19025 http://netarkivet.dk/ R http://www.netarkivet.dk/ text/html #002 20130103135034007+821 sha1:5NODPSJBNNUZPCK6OSG4VL23WKKOQR2F - content-size:19227,3t