We seem to be losing quite a few log records in a clustered web application writing to an NFS-mounted file with the configuration shown below. We are running logback-1.0.0. Any suggestions? <appender name="file" class="ch.qos.logback.core.rolling.RollingFileAppender"> <append>true</append> <prudend>true</prudend> <encoder> <pattern>%d ${HOSTNAME} [%t] %-5p %c - {%marker} %m%n</pattern> </encoder> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <maxHistory>10</maxHistory> <fileNamePattern>/xxx/log-%d.log</fileNamePattern> </rollingPolicy> </appender> --------------------------------------------------------------------------