Spelunking through the Datomic logs, I have come across many instances of the message below. Is there anything to be concerned about?
{
"Msg": "Cache put-result-handler error: net.spy.memcached.internal.CheckedOperationTimeoutException: Operation timed out. - failing node: /10.213.1.121:11211",
"Ex": {
"Cause": "Operation timed out. - failing node: /10.213.1.121:11211",
"Via": [
{
"Type": "java.util.concurrent.ExecutionException",
"Message": "net.spy.memcached.internal.CheckedOperationTimeoutException: Operation timed out. - failing node: /10.213.1.121:11211",
"At": [
"net.spy.memcached.internal.OperationFuture",
"get",
"OperationFuture.java",
180
]
},
{
"Type": "net.spy.memcached.internal.CheckedOperationTimeoutException",
"Message": "Operation timed out. - failing node: /10.213.1.121:11211",
"At": [
"net.spy.memcached.internal.OperationFuture",
"get",
"OperationFuture.java",
180
]
}
],
"Trace": [
[
"net.spy.memcached.internal.OperationFuture",
"get",
"OperationFuture.java",
180
],
[
"net.spy.memcached.internal.OperationFuture",
"get",
"OperationFuture.java",
140
],
[
"clojure.core$deref_future",
"invokeStatic",
"core.clj",
2292
],
[
"clojure.core$deref",
"invokeStatic",
"core.clj",
2312
],
[
"clojure.core$deref",
"invoke",
"core.clj",
2298
],
[
"datomic.mc_cache$safe_deref",
"invokeStatic",
"mc_cache.clj",
91
],
[
"datomic.mc_cache$safe_deref",
"invoke",
"mc_cache.clj",
89
],
[
"datomic.mc_cache$put_result_handler",
"invokeStatic",
"mc_cache.clj",
124
],
[
"datomic.mc_cache$put_result_handler",
"invoke",
"mc_cache.clj",
122
],
[
"datomic.mc_cache$wrap_metrics$fn__20916",
"invoke",
"mc_cache.clj",
44
],
[
"datomic.mc_cache$op_listener$reify__20923",
"onComplete",
"mc_cache.clj",
78
],
[
"net.spy.memcached.internal.AbstractListenableFuture$1",
"run",
"AbstractListenableFuture.java",
117
],
[
"java.util.concurrent.Executors$RunnableAdapter",
"call",
"Executors.java",
511
],
[
"java.util.concurrent.FutureTask",
"run",
"FutureTask.java",
266
],
[
"java.util.concurrent.ThreadPoolExecutor",
"runWorker",
"ThreadPoolExecutor.java",
1149
],
[
"java.util.concurrent.ThreadPoolExecutor$Worker",
"run",
"ThreadPoolExecutor.java",
624
],
[
"java.lang.Thread",
"run",
"Thread.java",
748
]
]
},
"Type": "Event",
"Tid": 5653,
"Timestamp": 1532657773211
}