--- a/src/hotspot/os/aix/os_aix.cpp	Tue Mar 26 07:24:26 2019 -0400
+++ b/src/hotspot/os/aix/os_aix.cpp	Fri Mar 22 04:47:02 2019 -0700
@@ -37,6 +37,7 @@
 #include "compiler/compileBroker.hpp"
 #include "interpreter/interpreter.hpp"
 #include "logging/log.hpp"
+#include "logging/logStream.hpp"
 #include "libo4.hpp"
 #include "libperfstat_aix.hpp"
 #include "libodm_aix.hpp"
@@ -923,6 +924,11 @@
     char buf[64];
     log_warning(os, thread)("Failed to start thread - pthread_create failed (%d=%s) for attributes: %s.",
       ret, os::errno_name(ret), os::Posix::describe_pthread_attr(buf, sizeof(buf), &attr));
+    // Log some OS information which might explain why creating the thread failed.
+    log_info(os, thread)("Number of threads approx. running in the VM: %d", Threads::number_of_threads());
+    LogStream st(Log(os, thread)::info());
+    os::Posix::print_rlimit_info(&st);
+    os::print_memory_info(&st);
   }
 
   pthread_attr_destroy(&attr);