RFR(XS) 8031065: LowMemoryTest2.sh fails: OutOfMemoryError: Metaspace (original) (raw)

shanliang shanliang.jiang at oracle.com
Thu Feb 27 03:59:47 PST 2014

Daniel Fuchs wrote:

On 2/27/14 11:43 AM, Mattias Tobiasson wrote:

Hi, Could you please review this test fix.

The test verifies that MemoryPoolMXBean sends a notification when used memory has reached the threshold. The flag thresholdExceeded marks if we have reached the memory threshold. When the flag is set, the test slows down to give time for the notification to be received. The problem is that thresholdExceeded is overwritten every time in the loop. Instead it should be set if any pool has reached the threshold. This means that the test continues to allocate memory at full speed, and we may get an OutOfMemory before we get the notification. Hi Mattias, I wonder whether you should also stop calling loadNext() once thresholdExceeded is true? Yes I am thinking this too.

Line 172 is unnecessary, after thresholdExceeded becomes true, Line 170 will always be skipped.

Shanliang

best regards, -- daniel

bug: https://bugs.openjdk.java.net/browse/JDK-8031065

webrev: http://cr.openjdk.java.net/~ykantser/8031065/webrev.00/ Mattias

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