Index Rebuild Job suddenly started failing

Heyas,

My maintenance plan for rebuilding indexes has started to fail below is the error message:

.Version 10.50.2500.0 for 64-bit  Copyright (C) Microsoft Corporation 2010. All rights reserved.    Started:  9:00:00 PM  Progress: 2016-08-02 21:00:02.84     Source: {6DFF2819-4B44-4B9D-8F99-A687CCB094AC}      Executing query "DECLARE @Guid UNIQUEIDENTIFIER      EXECUTE msdb..sp...".: 100% complete  End Progress  Progress: 2016-08-02 21:05:37.50     Source: Rebuild Index      Executing query "USE [AssetPlus]  ".: 0% complete  End Progress  Progress: 2016-08-02 21:05:37.51     Source: Rebuild Index      Executing query "ALTER INDEX [ABSENCES] ON [dbo].[ABSENCES] REBUILD...".: 0% complete  End Progress  Progress: 2016-08-02 21:05:37.51     Source: Rebuild Index      Executing query "USE [AssetPlus]  ".: 0% complete  End Progress  Progress: 2016-08-02 21:05:37.51     Source: Rebuild Index      Executing query "ALTER INDEX [ABSENCES_ID] ON [dbo].[ABSENCES] REBU...".: 0% complete  End Progress  Progress: 2016-08-02 21:05:37.51     Source: Rebuild Index      Executing query "USE [AssetPlus]  ".: 0% complete  End Progress  Progress: 2016-08-02 21:05:37.51     Source: Rebuild Index      Executing query "ALTER INDEX [ABSENCES2] ON [dbo].[ABSENCES] REBUIL...".: 0% complete  End Progress  Progress: 2016-08-02 21:05:37.51     Source: Rebuild Index      Executing query "USE [AssetPlus]  ".: 0% complete  End Progress  Progress: 2016-08-02 21:05:37.52     Source: Rebuild Index      Executing query "ALTER INDEX [ABSENCES3] ON [dbo].[ABSENCES] REBUIL...".: 0% complete  End Progress  Progress: 2016-08-02 21:05:37.52     Source: Rebuild Index      Executing query "USE [AssetPlus]  ".: 0% complete  End Progress  Progress: 2016-08-02 21:05:37.52     Source: Rebuild Index      Executing query "ALTER INDEX [ACCOUNT_NDX1] ON [dbo].[ACCOUNT] REBU...".: 0% complete  End Progress  Progress: 2016-08-02 21:05:37.52     Source: Rebuild Index      Executing query "USE [AssetPlus]  ".: 1% complete  End Progress  Progress: 2016-08-02 21:05:37.52     Source: Rebuild Index      Executing query "ALTER INDEX [ACCOUNT_NDX2] ON [dbo].[ACCOUNT] REBU...".: 1% complete  End Progress  Progress: 2016-08-02 21:05:37.52     Source: Rebuild Index      Executing query "USE [AssetPlus]  ".: 1% complete  End Progress  Progress: 2016-08-02 21:05:37.53     Source: Rebuild Index      Executing query "ALTER INDEX [PK_ACCOUNT] ON [dbo].[ACCOUNT] REBUIL...".: 1% complete  End Progress  Progress: 2016-08-02 21:05:37.53     Source: Rebuild Index      Executing query "USE [AssetPlus]  ".: 1% complete  End Progress  Progress: 2016-08-02 21:05:37.55     Source: Rebuild Index      Executing query "ALTER INDEX [PK_ACTIVATION] ON [dbo].[ACTIVATION] ...".: 1% complete  End Progress  Progress: 2016-08-02 21:05:37.55     Source: Rebuild Index      Executing query "USE [AssetPlus]  ".: 1% complete  End Progress  Progress: 2016-08-02 21:05:37.56     Source: Rebuild Index      Executing query "ALTER INDEX [PK_ACTIVITY_POLE] ON [dbo].[ACTIVITY_...".: 1% complete  End Progress  Progress: 2016-08-02 21:05:37.56     Source: Rebuild Index      Executing query "USE [AssetPlus]  ".: 1% complete  End Progress  Progress: 2016-08-02 21:05:37.56     Source: Rebuild Index      Executing query "ALTER INDEX [POLE_NDX1] ON [dbo].[ACTIVITY_POLE] R...".: 1% complete  End Progress  Progress: 2016-08-02 21:05:37.56     Source: Rebuild Index      Executing query "USE [AssetPlus]  ".: 1% complete  End Progress  Progress: 2016-08-02 21:05:37.56     Source: Rebuild Index      Executing query "ALTER INDEX [POLE_NDX2] ON [dbo].[ACTIVITY_POLE] R...".: 2% complete  End Progress  Progress: 2016-08-02 21:05:37.56     Source: Rebuild Index      Executing query "USE [AssetPlus]  ".: 2% complete  End Progress  Progress: 2016-08-02 21:05:37.57     Source: Rebuild Index      Executing query "ALTER INDEX [POLE_NDX3] ON [dbo].[ACTIVITY_POLE] R...".: 2% complete  End Progress  Progress: 2016-08-02 21:05:37.57     Source: Rebuild Index      Executin...  The package execution fa...  The step failed.

The indexes that are having issues are:
ALTER INDEX [ABSENCES]
ALTER INDEX [ABSENCES2]  
ALTER INDEX [ABSENCES3]
ALTER INDEX [ACCOUNT_NDX1]
ALTER INDEX [ACCOUNT_NDX2]
ALTER INDEX [PK_ACCOUNT]
ALTER INDEX [PK_ACTIVITY_POLE]
ALTER INDEX [PK_ACTIVATION]
ALTER INDEX [POLE_NDX1]
ALTER INDEX [POLE_NDX2]
ALTER INDEX [POLE_NDX3]
Troubleshooting so far:

- I have run dbcc checkdb no issues.
- My log file is under <1GB
- Log file is set to grow 10% every time.

How do I begin to troubleshoot this issue?

Any assistance is appreciated.

I am running SQL Server 2008 R2 Enterprise. also I keep my index online whilst reindexing.

Thank you.