-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Musafir,
On 8/18/15 1:08 PM, Mark Thomas wrote: > On 18/08/2015 17:10, musafir wrote: >> On Tue, Aug 18, 2015 at 11:57 AM, Mark Thomas <ma...@apache.org> >> wrote: >> >>> On 18/08/2015 16:50, musafir wrote: >>>> Hello, ugraded tomcat from 6.0.36(jdk 6) to tomcat7.0.57 >>>> (jdk7).. os:centos 6.6 ...seeing high cpu spike after >>>> upgrade.... doing top and thread dump shows only thread >>>> that is always using cpu is: >>> >>> How have you matched the thread using CPU in top with the >>> thread in the thread dump? >>> >>> Mark >>> >>> >>>> "ContainerBackgroundProcessor[StandardEngine[Catalina]]" >>>> daemon prio=10 tid=0x00007ff8fc599800 nid=0xc1d2e waiting on >>>> condition [0x00007ff803ffe000] java.lang.Thread.State: >>>> TIMED_WAITING (sleeping) at java.lang.Thread.sleep(Native >>>> Method) at >>> org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor. run(ContainerBase.java:1513) >>>> >>> at java.lang.Thread.run(Thread.java:745) >>>> >>>> disabled backgroundProcessorDelay >>>> (backgroundProcessorDelay=-1) ..don't see any thread that is >>>> always using cpu.. >>>> >>>> Q: why backgroundProcessorDelay will cause cpu spike. Is this >>>> disabled in tomcat6 by default? Q: will disabling >>>> backgroundProcessorDelay cause any other performance issues >>>> with tomcat7. >>>> >>>> >>>> Thanks for Help!! >>>> >>>> Regards >>>> >>> >>> Hi Mark pid java >>> >>> top -H -p pid for thread id cpu eating thread >>> >>> kill -3 pid for thread dump >>> >>> and hexa nid for thread id > > Then it looks like you did something wrong because the thread you > identified is sleeping. It won't be using any CPU. Assuming that the thread has been mis-identified, could it be this? https://bz.apache.org/bugzilla/show_bug.cgi?id=58151 That bug was filed/fixed against trunk/8.0. Any chance there is a similar bug in Tomcat 7? - -chris -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org iQIcBAEBCAAGBQJV02hnAAoJEBzwKT+lPKRYHuYP/3rS+QDW1ERhFtj1UrZ2tuxJ ds0Pw+SFY7x0SYW4WZrhEBRYSSgjwFH/Q7MZn6jaovh2Alk/xIfBsa9NKpsgGrfj dqNJAQF8JEw47W+tphXqO+ZlSqkiCa1h7nBLdS6/I7Ev2202IPPeDfVxUxgM8IAE 2Qec2u3NkHrkmP0jMZmnJmB6LS8XuL/QEuuQoz/EtC9PQrMOZu3/p554zjq2qFO9 uQif3Iqf2c/ISfT0ETrSbwcM5wpjGJeSG9vyQ27cFCrSVEYJlvaWibycKLLOhH46 KmyQmTZ55O5Y7tI9dsIYzrWxhkxAHuzIsUadeW4X6+3FYNJzFccmiz6+WkqckBPl ZbxRcH+ZoqgUYxE5Xdpxcyo4TbxU4AYCkwZzIS7kIhTVUi1Q07qcKKb8K9RX7YDI b6psvp1KK0rU+gxwFDqdvwIshaS3R3fhSd1QF1d3oZz0VhGFQ6IUJBni2sp1n7Tf /UvD9c7iXRrne5TfrGDu4GwxRcPyLBDOVjrOx70lGVajpyh8wOVWOSvaRwE2RIg6 4BbC/cAX89Ql8i1u5DwNsCOIGudOURqO6GvB4SZMbJHBWFFbFCxDa9YP2+UjWQbL 2lzR1FSYWD11TNuQbiUHaDzjxwsdWyzD/rLzXHAkBpl+PSBmDnGAxqUlv0w0UJnq xuae1n8DDdkkJymSl8hM =KDsj -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
