ADDITIONAL SYSTEM INFORMATION :
Darwin gzk0329 21.6.0 Darwin Kernel Version 21.6.0: Mon Aug 22 20:19:52 PDT 2022; root:xnu-8020.140.49~2/RELEASE_ARM64_T6000 arm64


A DESCRIPTION OF THE PROBLEM :
After try-with-resources closes resources, java.nio.Bits.reservedMemory didn't reduce
1. Write content to file via output stream.
        File tempFile = new File("/home/tmp/" + tempFileName);
        if (!tempFile.getParentFile().exists()) {
            tempFile.getParentFile().mkdirs();
        }
        try (OutputStream out = Files.newOutputStream(tempFile.toPath())){
            out.write(multipartFile.getBytes());
        } catch (IOException e) {
            e.printStackTrace();
        }
2. Observe that reservedMemory the field of java.nio.Bits has a significant growth

3.After multiple uploads, reservedMemory reaches maxMemory, and an exception java.lang.OutOfMemoryError: Direct buffer memory will be thrown

4.Try..... no problems
       try(FileOutputStream fos = new FileOutputStream(tempFile.getAbsolutePath())) {
            fos.write(multipartFile.getBytes());
        } catch (IOException e) {
            e.printStackTrace();
        }

5.So try-with-resources use with Files.newOutputStream will produce this problems, is there a bug here？

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. try-with-resources with Files.newOutputStream.

  File tempFile = new File("/home/tmp/" + tempFileName);
        if (!tempFile.getParentFile().exists()) {
            tempFile.getParentFile().mkdirs();
        }
        try (OutputStream out = Files.newOutputStream(tempFile.toPath())){
            out.write(multipartFile.getBytes());
        } catch (IOException e) {
            e.printStackTrace();
        }

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
reservedMemory the field of java.nio.Bits will not grown
ACTUAL -
reservedMemory the field of java.nio.Bits grown and won't recover

---------- BEGIN SOURCE ----------
1.Observe that reservedMemory the field of java.nio.Bits
File tempFile = new File("/home/tmp/" + tempFileName);
if (!tempFile.getParentFile().exists()) {
       tempFile.getParentFile().mkdirs();
}
 try (OutputStream out = Files.newOutputStream(tempFile.toPath())){
       out.write(multipartFile.getBytes());
} catch (IOException e) {
       e.printStackTrace();
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
 1. this code won't have the problem
 try(FileOutputStream fos = new FileOutputStream(tempFile.getAbsolutePath())) {
        fos.write(multipartFile.getBytes());
 } catch (IOException e) {
       e.printStackTrace();
 }



FREQUENCY : always