jconsole shows increasing of tread numbers

javatest: snapshot

Agent log:
[2422.764s][warning][os,thread] Failed to start thread - pthread_create failed (EAGAIN) for attributes: stacksize: 1024k, guardsize: 0k, detached.
Exception in thread "CommandExecutor executeThread for command args: [-suite, /net/spbnas402/export/SQE_jessika/qa-results/jck/9/ea/b51/network_mode_build/JCK-runtime-9, -resourcesRemovingStrategy, filesAndParents, -loadResourcesIntoMemory, false, -resource, tests/vm/classfmt/cpl/cplnat002/cplnat00201m1/cplnat00201m1p.jcod, -resource, tests/vm/classfmt/cpl/cplnat002/cplnat00201m1/cplnat00201m1n.jcod, com.sun.jck.lib.ExecInSeparateThreadCmd, -timeout, 600, com.sun.jck.lib.ExecJCKTestSameJVMCmd, -loadDir, /net/spbnas402/export/SQE_jessika/qa-results/jck/9/ea/b51/network_mode_build/JCK-runtime-9/classes, javasoft.sqe.tests.vm.classfmt.cpl.cplnat002.cplnat00201m1.cplnat00201m1]" java.lang.OutOfMemoryError: unable to create native thread: possibly out of memory or process/resource limits reached
        at java.base/java.lang.Thread.start0(Native Method)
        at java.base/java.lang.Thread.start(Thread.java:813)
        at com.sun.jck.lib.ExecInSeparateThreadCmd.getStatus(ExecInSeparateThreadCmd.java:46)
        at com.sun.jck.lib.ExecInSeparateThreadCmd.run(ExecInSeparateThreadCmd.java:34)
        at com.sun.jck.lib.ResourceLoaderCmd.run(ResourceLoaderCmd.java:75)
        at com.sun.javatest.agent.Agent$Task$CommandExecutor$2.run(Agent.java:897)
        at java.base/java.lang.Thread.run(Thread.java:844)
^C[2828.314s][warning][os,thread] Failed to start thread - pthread_create failed (EAGAIN) for attributes: stacksize: 1024k, guardsize: 0k, detached.