Predix timeseries Client Library Issue : java.lang.OutOfMemoryError: unable to create new native thread

Hi, I am trying to query about 22620 tags from a Time-series at one instance. the Micro service is running with 5G memory and 2 instances. i am using following configurations

 predix.timeseries.maxTagsPerQuery=20
 predix.timeseries.maxIngestionMessageSize=511000
 # Predix Timeseries configuration. <<<<< 511 kbytes max
 
 #Purchased Plan restrictions. >>>>>
 # MODIFY TO SUIT YOUR PLAN. GOING OVER MIGHT RESULT IN ADDED CHARGES
 plan.ingestion.concurrent.connections.max=2
 plan.query.concurrent.connections.max=400

So my understanding is the library can establish max 400 connection at any time with the timeseries and can fetch only 20 tags per connection.

Sometimes Micro service gave me the following error

 2017-06-22 06:58:44.726 ERROR 29 --- [io-63784-exec-9] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Handler dispatch failed; nested exception is **java.lang.OutOfMemoryError: unable to create new native thread] with root cause**
     at java.lang.Thread.start(Thread.java:714) [na:1.8.0_101]
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_101]
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_101]
     at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) ~[spring-webmvc-4.3.8.RELEASE.jar!/:4.3.8.RELEASE]
     at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262) ~[spring-web-4.3.8.RELEASE.jar!/:4.3.8.RELEASE]
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) ~[tomcat-embed-core-8.5.14.jar!/:8.5.14]
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.14.jar!/:8.5.14]
     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.8.RELEASE.jar!/:4.3.8.RELEASE]
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) [tomcat-embed-core-8.5.14.jar!/:8.5.14]
     at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:81) ~[spring-web-4.3.8.RELEASE.jar!/:4.3.8.RELEASE]
     at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) ~[spring-webmvc-4.3.8.RELEASE.jar!/:4.3.8.RELEASE]
     at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:311) [tomcat-embed-core-8.5.14.jar!/:8.5.14]
     at org.apache.catalina.core.StandardHostValve.throwable(StandardHostValve.java:349) [tomcat-embed-core-8.5.14.jar!/:8.5.14]
     at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.14.jar!/:8.5.14]
     at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:392) ~[tomcat-embed-core-8.5.14.jar!/:8.5.14]
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.14.jar!/:8.5.14]
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.14.jar!/:8.5.14]
     at java.lang.Thread.run(Thread.java:745) [na:1.8.0_101]
     at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963) ~[spring-webmvc-4.3.8.RELEASE.jar!/:4.3.8.RELEASE]
     at java.lang.Thread.start0(Native Method) [na:1.8.0_101]
 **java.lang.OutOfMemoryError: unable to create new native thread**
     at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) ~[spring-webmvc-4.3.8.RELEASE.jar!/:4.3.8.RELEASE]
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.14.jar!/:8.5.14]
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.14.jar!/:8.5.14]
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.14.jar!/:8.5.14]
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.14.jar!/:8.5.14]
     at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:677) [tomcat-embed-core-8.5.14.jar!/:8.5.14]

I searched it on google and find out ... This is not a memory problem, but an operating system resource problem. You are running out of native threads.

1. how many threads the Docker Container will allow your JVM to use?

2. According to my understanding 400 threads are not too much, right?

3. Is there any way around this?

Your Help is much appreciated...!