How does a single network card emitting bad packets effect other sites? > investigations into the logs, including packet captures, was occurring in tandem, which ultimately identified a suspected card issue in Denver, CO. Field Operations were dispatched to remove the card. Once removed, it did not appear there had been significant improvement; however, the logs were further scrutinized .. to identify that the source…
From the book "Release It!", the author describes an incident where an airline's entire check-in system went down for three hours, grounding its hundreds of planes and causing a pretty big backlog for hours more. The 'root cause' was code on the flight search server:
lookupByCity(...) {
....
try {
conn = connectionPool.getConnection();
stmt = conn.createStatement();
...
} finally {
if (stmt != null) {
stmt.close();
}
if (conn != null) {
conn.close();
}
}
}