The responses in soak test reach really high values (hundreds of ms) compared to EAP 6 (max 10 ms). Also number of unhealthy samples (samples which arrive later than in 3 seconds) is really high in EAP7 run compared to 0 unhealthy samples in EAP6 run.

EAP7 run also logs few sampling errors in almost each iteration, EAP6 did not.

Compare these results:

EAP7: performance.txt
(example:
response min: 0 ms, mean: 965 ms, max: 16034 ms, sampling errors: 5, unhealthy samples: 86209)
EAP6: performance.txt
(example:
response min: 0 ms, mean: 6 ms, max: 1053 ms, sampling errors: 0, unhealthy samples: 0)