我想查看jitdump.20160505.165247.149.0004.dmp文件。
它由IBM JVM 1.8在崩潰時生成。有誰知道如何閱讀dmp文件?如何閱讀IBM jit轉儲文件
我試圖用jextract來分析它,但它的投訴如下:
/opt/ibm/ibm-java-x86_64-80/jre/bin/jextract /tmp/jitdump.20160505.165247.149.0004.dmp -v
Loading dump file...
Error. Dump type not recognised, file: /tmp/jitdump.20160505.165247.149.0004.dmp
當試圖通過MAT + DTFJ打開jitdump文件,這裏是錯誤消息:
Error opening heap dump 'jitdump.20160505.165247.149.0004.dmp'. Check the error log for further details.
Unable to read dump C:\Users\IBM_ADMIN\Desktop\core_files\opt\ibm\apm\playback\selenium\jitdump.20160505.165247.149.0004.dmp metafile null in DTFJ format DTFJ-J9 (java.io.IOException)
Unable to read dump C:\Users\IBM_ADMIN\Desktop\core_files\opt\ibm\apm\playback\selenium\jitdump.20160505.165247.149.0004.dmp metafile null in DTFJ format DTFJ-J9
No Image sources were found for C:\Users\IBM_ADMIN\Desktop\core_files\opt\ibm\apm\playback\selenium\jitdump.20160505.165247.149.0004.dmp (java.io.IOException)
No Image sources were found for C:\Users\IBM_ADMIN\Desktop\core_files\opt\ibm\apm\playback\selenium\jitdump.20160505.165247.149.0004.dmp
接受這個答案,至少我明白,如果沒有IBM JIT編譯器的知識,我無法理解jitdump的內容。 – Xiaoming
是的,在答案中提出的另一點是,無論實際問題是否與JIT相關,都可以生成jitdump。即,jitdump只是IBM JDK爲了能夠進行事後分析而創建的轉儲之一。崩潰輸出是否說明它在JIT模塊或JIT生成的代碼中崩潰? – vijaysun
是的。它在JIT模塊中墜毀。 1XHEXCPMODULE模塊:/opt/ibm/ibm-java-x86_64-80/jre/lib/amd64/compressedrefs/libj9jit28.so。收到轉儲事件「gpf」。 Java堆大小看起來不錯,在javacore文件中找不到死鎖。這就是我試圖研究jitdump的原因 – Xiaoming