Server log file in AE is gettting filled up in wm711

Hi,
The server log and error log file is getting filled up with the following message everyday. Although i have restarted the AE for 2-3 times, still than this problem is existing. Please suggest me.

(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:23.682 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: IsService Common Attributes, Time: Sun Oct 05 02:50:32 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:23.682 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: IsService Required Attributes, Time: Sun Oct 05 02:50:32 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:23.683 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: IsService Rare Attributes, Time: Sun Oct 05 02:50:32 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:23.683 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: IsService Common Attributes, Time: Sun Oct 05 02:50:32 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:28.651 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: IsService Common Attributes, Time: Sun Oct 05 02:50:32 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:28.651 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: IsService Required Attributes, Time: Sun Oct 05 02:50:32 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:28.651 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: IsBrokerTransport Required Attributes, Time: Sun Oct 05 02:50:32 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:28.651 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: IsBrokerTransport Rare Attributes, Time: Sun Oct 05 02:50:32 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:43.689 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: AnalyticEnginePersistence, Time: Sun Oct 05 02:50:44 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:43.690 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: AnalyticEnginePersistence, Time: Sun Oct 05 02:50:48 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:43.690 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: AnalyticEnginePersistence, Time: Sun Oct 05 02:50:48 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:43.690 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: AnalyticEngineHealth, Time: Sun Oct 05 02:50:48 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:43.690 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: GarbageCollection, Time: Sun Oct 05 02:50:48 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:43.690 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: GarbageCollection, Time: Sun Oct 05 02:50:48 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:43.691 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: AnalyticEngineOnline, Time: Sun Oct 05 02:50:48 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:43.691 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: QueueMetrics, Time: Sun Oct 05 02:51:01 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:43.691 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: QueueMetrics, Time: Sun Oct 05 02:51:01 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:47.707 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: QueueMetrics, Time: Sun Oct 05 02:51:01 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:47.707 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: QueueMetrics, Time: Sun Oct 05 02:51:01 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:47.707 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: QueueMetrics, Time: Sun Oct 05 02:51:01 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:47.707 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: QueueMetrics, Time: Sun Oct 05 02:51:01 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:47.708 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: QueueMetrics, Time: Sun Oct 05 02:51:01 CEST 2008
(OPTIMIZE) [Analytic Engine v7.1.0.0.com.webmethods.optimize.util.BufferedQueue.bufferedQueueItemDropped] 2008-10-06 01:11:47.708 CEST ERROR: Dropped Queue Item - CanonicalEvent Name: QueueMetrics, Time: Sun Oct 05 02:51:01 CEST 2008