-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Todd,
On 9/23/14 11:41 AM, Todd Chapman wrote: > My application uses the Tomcat JDBC pool. While using netstat and > tcpdump to diagnose connection problems I noticed that the client > side occasionally closes a DB connection and opens a new one. That > is unexpected based on my configuration. > > poolProperties.setInitialSize(10); poolProperties.setMinIdle(10); > poolProperties.setMaxActive(100); poolProperties.setMaxIdle(100); > poolProperties.setMaxWait(10000); Okay. > poolProperties.setTimeBetweenEvictionRunsMillis(30000); > poolProperties.setMinEvictableIdleTimeMillis(30000); > poolProperties.setTestWhileIdle(false); These 3 settings together don't make any sense: if you have disabled idle-checking, then setting the schedule for idle-checking isn't getting you anything. > poolProperties.setTestOnBorrow(true); > poolProperties.setValidationQuery("SELECT 1 AS data"); > poolProperties.setValidationInterval(3); The validation interval is specified in milliseconds. Are you sure you want a value so low? > poolProperties.setLogValidationErrors(true); > poolProperties.setTestOnReturn(false); poolProperties. maxAge(0); Note that maxAge=0 is the default. > I would expect the pool size to never shrink based on this > configuration. Well maybe if borrow test fails but no validation > errors are being logged. > > How can I figure out where close() is being called on the physical > DB connection? I tried writing a JdbcInterceptor but it's > disconnected() method gets called on the PooledConnection, not the > physical connection. > > Does Tomcat JDBC Pool implement javax.sql.ConnectionEventListener > interface? Could this be the typical firewall-timeout where a network component is dropping the connection in the middle, rather than one or the other end of the connection dropping it? What about the database itself? Are there any connection timeouts over there? - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: GPGTools - http://gpgtools.org iQIcBAEBCAAGBQJUIsjfAAoJEBzwKT+lPKRYBsYP/irwy6tz9Xrf4sM9zGCWc/AS aLVyRua/ZhPy+wLyi/LRXjCXHdEekANIqdrKV9jXOPyyIvnB4kwKo3nubPtzNgA3 GeHeJktLjoz0OMrUI1TPUEU8wab2VNqXBmxF+5yOTExDKSUSfUee4xj/0EVgJ2Jw +0YvldtF5RCcTtNNSR38+lUreTTkmaMDGCvhfFY6xXwtU3f7jLUhj9RbFMEwjgDs W9VOHF9YKoleiPrzXVxHzPvvJB7k1aSoGreDOorauDnXHK6s5/9BhX7HxLUFZ1U7 /xdJR8Ul8XjaxNV7zfW1BErUCvjD2V27ASNPNHSnMGrJbElBW8tR23LeH+9Au0fI w2/G7MsOp4GpU6t/8I0uyLoiEz85USyRJdVn/PuDTrV3X4aKXt3nnT3wUSQelkyq zW+MASMflDPoxEjXPkvb9WO6a8ZaFFQQlHauqIkT1GUEpM0ii1cY7IJPJYSAyvg/ eMYUFTn17Ml1GCQeLvUWbcbbvisfUJC0SZ7l+5zlUD5FsU/B71gmqgIjVLN+qW6C CfV7rBUgKBzgb8LfU2GE4e7PxFUj+161pv/Vyaf8UoYvhhzdXCtg76qndRgbwugK gW2j5FApz934BiHNJKzVKfHI5nJPOpL44N2fQAG+KyT1Ojc8pr0E+8FB67g1eTYE IvLlYB4adCxQcIy9wqxN =9crk -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org