It is not due to time out. We have been going back and forth with DP support on this and no resolution so far.
The jobs worked fine for and then failed all of a sudden. The support showed the following error from the logs.
[260] [IpcIO_Recv] SSL_read(0000000000DA3A70) -1 ssl: 2 'error:00000002:lib(0):func(0):reason(2)'
[260] [IpcIO_Recv] SSL_read(0000000000DA3A70) -1 err: 0 'error:00000000:lib(0):func(0):reason(0)'
[260] [IpcIO_Recv] SSL_read(0000000000DA3A70) -1 ern: 10035 'Unknown error'
When I saw this I went ahead and enabled the encrypted communication again by right clicking the clients(they were enabled in all the clients because DP disk agent has an exploit vulnerability if you don't). This fixed the issue for a while.
However, we are back on the same track and the jobs fail with the same error again. We use storeoncesoftware component and not the appliance.