Threads stuck in java.util.HashMap.put

We are seeing threads are getting stuck on java.util.HashMap.put. Here is the snippet of thread dump

"/atg/dynamo/server/DrpServer-75:ipaddr=128.241.218.171;path=/businesscare/login/password_update_input.jsp;sessionid=C3ELZLX1KBZ0TB4R0ENCFFI" prio=5 tid=0x01d297a8 nid=0x11f sleeping[0x0ec7c000..0x0ec7fc28]
at java.util.HashMap.put(HashMap.java:382)
at org.apache.axis.encoding.TypeMappingImpl.internalRegister(TypeMappingImpl.java:263)
at org.apache.axis.encoding.TypeMappingImpl.register(TypeMappingImpl.java:221)
at org.apache.axis.encoding.TypeMappingDelegate.register(TypeMappingDelegate.java:73)
at org.apache.axis.client.Call.registerTypeMapping(Call.java:2285)
at org.apache.axis.client.Call.registerTypeMapping(Call.java:2322)
at com.att.wireless.external.interfaces.csi.soap.stub.InquireSubscriberProfile_2_0Stub.createCall(InquireSubscriberProfile_2_0Stub.java:4307)

• locked <0x72b0b3d8> (a com.att.wireless.external.interfaces.csi.soap.stub.InquireSubscriberProfile_2_0Stub)
  at com.att.wireless.external.interfaces.csi.soap.stub.InquireSubscriberProfile_2_0Stub.inquireSubscriberProfile(InquireSubscriberProfile_2_0Stub.java:4330)
  at com.att.wireless.external.services.isp.InquireSubscriberProfileService.inquireSubscriberProfile(InquireSubscriberProfileService.java:106)
  at com.att.wireless.care.profile.dao.SharedServicesDAO.inquireSubscriberProfileHelper(SharedServicesDAO.java:1462)
  at com.att.wireless.care.profile.dao.SharedServicesDAOWithSimulator.inquireSubscriberProfileHelper(SharedServicesDAOWithSimulator.java:175)
  at com.att.wireless.care.profile.dao.SharedServicesDAO.getCacheElement(SharedServicesDAO.java:2591)
  at atg.service.cache.Cache.setWaiterAndGetValue(Cache.java:181)
  at atg.service.cache.Cache.get(Cache.java:390)
  at com.att.wireless.care.profile.dao.SharedServicesDAO.inquireSubscriberProfile(SharedServicesDAO.java:514)
  at com.att.wireless.care.cpni.CpniNotificationService.isCTNValid(CpniNotificationService.java:1327)
  at com.att.wireless.care.cpni.CpniNotificationService.populateContactInformationBean(CpniNotificationService.java:832)
  at com.att.wireless.care.cpni.CpniNotificationService.populateProfileOwner(CpniNotificationService.java:773)
  at com.att.wireless.care.cpni.CpniNotificationService.processOnlineAccountPasswordModified(CpniNotificationService.java:368)
  at com.att.wireless.care.cpni.CpniNotificationService.sendCPNINotificationRequest(CpniNotificationService.java:221)
  at com.att.wireless.care.profile.web.FirstTimeLoginFormHandler.handlePasswordReset(FirstTimeLoginFormHandler.java:139)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)