Emergence Capital has led a $25 million Series C in LogDNA, which operates a log-management platform to help developers create and debug applications. The startup also announced that Tucker Callaway, LogDNA's president and chief revenue officer, will take over as CEO, while current CEO Chris Nguyen will transition to chief strategy officer.Additional InvestorsInitialized Capital Management, Providence Equity Partners, TI Platform Management, Radianx Capital, Trend Forward Capital, Top Tier Capital Partners