Just had a moment to run a show log system all and saw this issue in the logs.
Aug 6 08:55:19 :304001: <ERRS> |stm| Unexpected stm (Station management) runtime error at arm_update, 323, Invalid length AP 00:24:6c:1a:6f:e0 got 23423 expect 1388
Aug 6 08:55:26 :303073: <ERRS> |nanny| Process /mswitch/bin/stm [pid 13935] died: got signal SIGSEGV
Aug 6 08:55:33 :303029: <ERRS> |nanny| Process /mswitch/bin/stm [pid 13935]: crash data saved in dir /flash/crash/process/8-6-2013@08-55-26/stm
Aug 6 08:55:38 :303079: <ERRS> |nanny| Restarted process /mswitch/bin/stm, new pid 27675
Aug 6 08:55:38 :303025: <ERRS> |nanny| Found core file /tmp/core.13935.stm.A72xx_38532, 65339392 bytes, compressing...
Aug 6 08:55:42 KERNEL: 0:<7>UDP: short packet: From 255.255.255.255:8211 1621/1517 to 129.2.139.140:8419
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Aug 6 08:55:49 :304001: <ERRS> |stm| Unexpected stm (Station management) runtime error at handle_ap_statistics, 1019, Length mismatch expected 1527 received 1387 from AP with eth_mac d8:c7:c8:c6:96:d3, and phy_type is 1
Aug 6 08:55:53 :304001: <ERRS> |stm| Unexpected stm (Station management) runtime error at handle_ap_statistics, 1019, Length mismatch expected 1527 received 1387 from AP with eth_mac 00:24:6c:c9:96:32, and phy_type is 1
Aug 6 08:55:54 :304001: <ERRS> |stm| Unexpected stm (Station management) runtime error at handle_ap_statistics, 1019, Length mismatch expected 1527 received 1387 from AP with eth_mac d8:c7:c8:c6:96:bb, and phy_type is 1
Aug 6 08:55:55 :304001: <ERRS> |stm| Unexpected stm (Station management) runtime error at handle_ap_statistics, 1019, Length mismatch expected 1527 received 1387 from AP with eth_mac 00:24:6c:c9:a7:08, and phy_type is 1
Aug 6 08:55:59 :304001: <ERRS> |stm| Unexpected stm (Station management) runtime error at handle_ap_statistics, 1019, Length mismatch expected 1527 received 1387 from AP with eth_mac 00:24:6c:c9:a6:e4, and phy_type is 1
Aug 6 08:55:59 :304001: <ERRS> |stm| Unexpected stm (Station management) runtime error at handle_ap_statistics, 1019, Length mismatch expected 1527 received 1387 from AP with eth_mac 00:1a:1e:c7:c0:4e, and phy_type is 1
Aug 6 08:56:04 :304001: <ERRS> |stm| Unexpected stm (Station management) runtime error at handle_ap_statistics, 1019, Length mismatch expected 1527 received 1387 from AP with eth_mac 00:24:6c:c9:96:34, and phy_type is 1
Aug 6 08:56:04 :304001: <ERRS> |stm| Unexpected stm (Station management) runtime error at handle_ap_statistics, 1019, Length mismatch expected 1527 received 1387 from AP with eth_mac 00:24:6c:c9:a6:f2, and phy_type is 1
Aug 6 08:56:07 :303080: <ERRS> |nanny| Please tar and email the file crash.tar to support@arubanetworks.com
Aug 6 08:56:07 :303081: <ERRS> |nanny| To tar type the following commands at the Command Line Interface: (1) tar crash (2) copy flash: crash.tar tftp: [serverip] [destn filename]
Aug 6 08:56:08 :304001: <ERRS> |stm| Unexpected stm (Station management) runtime error at handle_ap_statistics, 1019, Length mismatch expected 1527 received 1387 from AP with eth_mac 00:1a:1e:c7:c2:28, and phy_type is 1
Aug 6 08:56:08 :304001: <ERRS> |stm| Unexpected stm (Station management) runtime error at handle_ap_statistics, 1019, Length mismatch expected 1527 received 1387 from AP with eth_mac 00:24:6c:c9:96:20, and phy_type is 1
Aug 6 08:56:10 :304001: <ERRS> |stm| Unexpected stm (Station management) runtime error at handle_ap_statistics, 1019, Length mismatch expected 1527 received 1387 from AP with eth_mac 00:24:6c:c9:a7:56, and phy_type is 1
Aug 6 08:56:13 :311004: <WARN> |AP RIEOC_AP105.10@10.200.200.10 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:13 :311004: <WARN> |AP RIHPHC_AP105.1@10.203.89.2 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:13 :311004: <WARN> |AP RIETH_AP105.2@10.230.40.4 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:13 :311004: <WARN> |AP RIDOTMT_AP105.1@10.203.36.11 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:13 :311004: <WARN> |AP RIETH_AP105.1@10.230.40.3 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:14 :311004: <WARN> |AP RIEOC_AP105.8@10.200.200.12 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:14 :311004: <WARN> |AP RIEOC_AP105.5@10.200.200.9 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:14 :311004: <WARN> |AP RIEOC_AP105.3@10.200.200.8 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:14 :311004: <WARN> |AP RISH_AP65.7@10.230.4.3 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:14 :311004: <WARN> |AP RISH_AP65.3@10.230.4.7 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:14 :311004: <WARN> |AP RISH_AP65.1@10.230.4.6 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:14 :311004: <WARN> |AP RIDOA_AP105.8@158.123.114.202 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:14 :311004: <WARN> |AP RISH_AP65.2@10.230.4.5 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:14 :311004: <WARN> |AP RIEOC_AP105.12@10.200.200.6 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:14 :311004: <WARN> |AP RIEOC_AP105.7@10.200.200.2 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:14 :311004: <WARN> |AP RIDOA_AP65.1@158.123.114.207 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:14 :311004: <WARN> |AP RISH_AP65.8@10.230.4.4 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:15 :311004: <WARN> |AP RIDOA_AP65.5@158.123.114.151 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:15 :311004: <WARN> |AP RISH_AP65.9@10.230.4.10 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:15 :311004: <WARN> |AP RISH_AP65.6@10.230.4.2 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:15 :311004: <WARN> |AP RIDOA_AP65.6@158.123.114.150 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:15 :311004: <WARN> |AP RIPUC_AP65.1@10.203.1.3 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:15 :311004: <WARN> |AP RIDOA_AP65.12@158.123.114.160 sapd| Missed 25 heartbeats; rebootstrapping
Aug 6 08:56:16 :311004: <WARN> |AP RIDOA_AP65.11@158.123.114.148 sapd| Missed 25 heartbeats; rebootstrapping
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Aug 6 09:06:28 :304001: <ERRS> |stm| Unexpected stm (Station management) runtime error at handle_ap_statistics, 1019, Length mismatch expected 1527 received 1387 from AP with eth_mac 00:24:6c:c9:a6:f6, and phy_type is 1
Aug 6 09:06:46 :304001: <ERRS> |stm| Unexpected stm (Station management) runtime error at handle_ap_statistics, 1019, Length mismatch expected 1527 received 1387 from AP with eth_mac 00:24:6c:c9:a6:fe, and phy_type is 1
Aug 6 09:06:50 :304001: <ERRS> |stm| Unexpected stm (Station management) runtime error at handle_ap_statistics, 1019, Length mismatch expected 1527 received 1387 from AP with eth_mac d8:c7:c8:c6:96:d3, and phy_type is 1
Aug 6 09:06:50 KERNEL: 0:<7>UDP: short packet: From 255.255.255.255:8211 1621/1517 to 129.2.139.140:8419
Aug 6 09:06:50 :304001: <ERRS> |stm| Unexpected stm (Station management) runtime error at handle_ap_statistics, 1019, Length mismatch expected 1527 received 1387 from AP with eth_mac 6c:f3:7f:c5:bd:ec, and phy_type is 1
Aug 6 09:07:10 KERNEL: 0:<7>UDP: short packet: From 255.255.255.255:8211 1621/1517 to 193.0.12.160:8419
#7210