This error seems related to Redis:
http://stackoverflow.com/questions/18430324/redis-error-oom-command-not-allowed-when-used-memory-maxmemory
On Tuesday, August 11, 2015 at 1:09:03 PM UTC-4, piast...@gmail.com wrote:
>
>
> I do not know much about the JVM. I never worked with Java, though I am
> now working with Clojure. I am getting this error:
>
> clojure.lang.ExceptionInfo: OOM command not allowed when used memory >
> 'maxmemory'. {:prefix :oom} stack trace: {:class
> clojure.lang.ExceptionInfo, :message \"OOM command not allowed when used
> memory > 'maxmemory'.\
>
> We have a server that has 20 gigs of physical RAM, though the app itself
> has these memory limits:
>
> :jvm-opts ["-Xms300m" "-Xmx2000m" "-XX:-UseCompressedOops"]
>
> I saw that Sean Corfield posted this code to track memory use, so I have
> been using this to keep track of my app's memory usage:
>
> (defn- memory-bean
> "Return the MemoryMXBean."
> []
> (java.lang.management.ManagementFactory/getMemoryMXBean))
>
> (defn- heap-usage
> "Given a MemoryMXBean, return the heap memory usage."
> [^java.lang.management.MemoryMXBean bean]
> (.getHeapMemoryUsage bean))
>
> (defn- heap-used-max
> "Given heap memory usage, return a pair of used/max values."
> [^java.lang.management.MemoryUsage usage]
> [(.getUsed usage) (.getMax usage)])
>
> (defn memory-usage
> "Return percentage, used, max heap as strings."
> []
> (let [used-max (-> (memory-bean) (heap-usage) (heap-used-max))]
> (cons (as-percentage used-max)
> (as-megabytes used-max))))
>
>
> Right now I have this run every 60 seconds, so I can keep track of what is
> happening in my app. In my logs, a few seconds after I get the OOM error, I
> see this output:
>
> Resource usage:
> Memory in use (percentage/used/max-heap): (\"6%\" \"228M\" \"3342M\")
> CPU usage (how-many-cpu's/load-average): [6 1.81]
> Free memory in jvm: [363319552]"
>
> Perhaps I am reading this wrong? It looks like the app is not using much
> RAM, yet I get an OOM error? This leaves me confused.
>
> In the stacktrace, the line that triggers the OOM error is a line where I
> write a string into Redis, using the Carmine library:
>
> (carmine/hset document-id "alert" alert-as-string)
>
> But the string alert-as-string is very small, only about 200 characters,
> so I can not imagine how that puts any strain on memory.
>
>
>
>
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