The graphs do not load for the statistics pages. Chat log are archived however. I just setup Openfire 3.10.0 and the monitoring plugin was installed directly from the available plugins page in the admin interface, showing version 1.4.2. Log file shows the following:
2015.05.06 11:32:16 org.jivesoftware.openfire.reporting.stats.StatsEngine - Error sampling for statistic muc_outgoing
org.jrobin.core.RrdException: Bad sample timestamp 1430929920. Last update time was 1430944740, at least one second st is required
at org.jrobin.core.RrdDb.store(Unknown Source)
at org.jrobin.core.Sample.update(Unknown Source)
at org.jivesoftware.openfire.reporting.stats.StatsEngine$SampleTask.run(StatsEngin e.java:395)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
2015.05.06 11:32:16 org.jivesoftware.openfire.reporting.stats.StatsEngine - Error sampling for statistic server_sessio
org.jrobin.core.RrdException: Bad sample timestamp 1430929920. Last update time was 1430944740, at least one second st is required
at org.jrobin.core.RrdDb.store(Unknown Source)
at org.jrobin.core.Sample.update(Unknown Source)
at org.jivesoftware.openfire.reporting.stats.StatsEngine$SampleTask.run(StatsEngin e.java:395)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
2015.05.06 11:32:16 org.jivesoftware.openfire.reporting.stats.StatsEngine - Error sampling for statistic muc_rooms
org.jrobin.core.RrdException: Bad sample timestamp 1430929920. Last update time was 1430944740, at least one second st is required
at org.jrobin.core.RrdDb.store(Unknown Source)
at org.jrobin.core.Sample.update(Unknown Source)
at org.jivesoftware.openfire.reporting.stats.StatsEngine$SampleTask.run(StatsEngin e.java:395)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
2015.05.06 11:32:16 org.jivesoftware.openfire.reporting.stats.StatsEngine - Error sampling for statistic conversations
org.jrobin.core.RrdException: Bad sample timestamp 1430929920. Last update time was 1430944740, at least one second st is required
at org.jrobin.core.RrdDb.store(Unknown Source)
at org.jrobin.core.Sample.update(Unknown Source)
at org.jivesoftware.openfire.reporting.stats.StatsEngine$SampleTask.run(StatsEngin e.java:395)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
2015.05.06 11:32:16 org.jivesoftware.openfire.reporting.stats.StatsEngine - Error sampling for statistic muc_users
org.jrobin.core.RrdException: Bad sample timestamp 1430929920. Last update time was 1430944740, at least one second st is required
at org.jrobin.core.RrdDb.store(Unknown Source)
at org.jrobin.core.Sample.update(Unknown Source)
at org.jivesoftware.openfire.reporting.stats.StatsEngine$SampleTask.run(StatsEngin e.java:395)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
2015.05.06 11:32:16 org.jivesoftware.openfire.reporting.stats.StatsEngine - Error sampling for statistic server_bytes_
org.jrobin.core.RrdException: Bad sample timestamp 1430929920. Last update time was 1430944740, at least one second st is required
at org.jrobin.core.RrdDb.store(Unknown Source)
at org.jrobin.core.Sample.update(Unknown Source)
at org.jivesoftware.openfire.reporting.stats.StatsEngine$SampleTask.run(StatsEngin e.java:395)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
2015.05.06 11:32:16 org.jivesoftware.openfire.reporting.stats.StatsEngine - Error sampling for statistic sessions
org.jrobin.core.RrdException: Bad sample timestamp 1430929920. Last update time was 1430944740, at least one second st is required
at org.jrobin.core.RrdDb.store(Unknown Source)
at org.jrobin.core.Sample.update(Unknown Source)
at org.jivesoftware.openfire.reporting.stats.StatsEngine$SampleTask.run(StatsEngin e.java:395)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
2015.05.06 11:32:16 org.jivesoftware.openfire.reporting.stats.StatsEngine - Error sampling for statistic packet_count
org.jrobin.core.RrdException: Bad sample timestamp 1430929920. Last update time was 1430944740, at least one second st is required
at org.jrobin.core.RrdDb.store(Unknown Source)
at org.jrobin.core.Sample.update(Unknown Source)
at org.jivesoftware.openfire.reporting.stats.StatsEngine$SampleTask.run(StatsEngin e.java:395)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)