Restart connections to instance

[ligurio]

2020-10-22 11:37:22,805{GMT}    WARN    [jepsen worker 4] jepsen.core: Process 359 crashed
java.lang.NullPointerException: null
2020-10-22 11:37:22,805{GMT}    INFO    [jepsen worker 4] jepsen.util: 359      :info   :add    [0 1248]        indeterminate: 
2020-10-22 11:37:22,812{GMT}    WARN    [jepsen worker 1] jepsen.core: Process 341 crashed
java.lang.NullPointerException: null
2020-10-22 11:37:22,812{GMT}    INFO    [jepsen worker 1] jepsen.util: 341      :info   :add    [0 1249]        indeterminate: 
2020-10-22 11:37:22,816{GMT}    INFO    [jepsen worker 1] jepsen.util: 346      :invoke :add    [0 1250]
2020-10-22 11:37:22,835{GMT}    INFO    [jepsen worker 3] jepsen.util: 373      :invoke :add    [0 1251]
2020-10-22 11:37:22,847{GMT}    WARN    [jepsen worker 1] jepsen.core: Process 346 crashed
java.lang.NullPointerException: null

Possible solutions:

• check conn object for Null
• check conn object for closeness with .isClosed