java - 巨大的堆转储 (11GB) - Jhat 失败并且 Eclipse MAT 需要帮助

Question

我们的 EA 中出现内存错误，我们使用 -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/path/to/some/dir 在 OOM 时转储堆。

我们有 12GB 的堆内存和 256MB 的永久代内存。

堆转储是在我们运行应用程序的 Linux 机器中生成的，其大小为 11.5GB。我们没有权限下载到我们本地。

当我们尝试使用 JHAT 分析 11GB 堆转储时它引发了 OOM。

我们从 Linux CLI 尝试了以下命令。

jhat java_pid1491.hprof
jhat -J-Xmx16g -XX:-UseBiasedLocking java_pid1491.hprof
jhat -J-d64 -J-Xmx16g -J-XX:-UseBiasedLocking java_pid1491.hprof#1

对于所有选项，它在读取转储几分钟(>30 分钟)后抛出 OOM 异常。

我们用谷歌搜索并找到了MAT作为一个强大的堆转储分析器，但不是在 LINUX 中使用它的方法。

任何建议都会有更大的帮助。谢谢。

修改:

在 Linux x86_64 机器上安装了 MAT 但在执行 ./MemoryAnalyzer 时出现以下错误

(.:17319): GLib-GObject-WARNING **: invalid (NULL) pointer instance
(.:17319): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed
(.:17319): Gtk-CRITICAL **: gtk_settings_get_for_screen: assertion `GDK_IS_SCREEN (screen)' failed
(.:17319): GLib-GObject-CRITICAL **: g_object_get: assertion `G_IS_OBJECT (object)' failed
(.:17319): Gtk-WARNING **: Screen for GtkWindow not set; you must always set
a screen for a GtkWindow before using the window
(.:17319): Gdk-CRITICAL **: gdk_pango_context_get_for_screen: assertion `GDK_IS_SCREEN (screen)' failed
(.:17319): Pango-CRITICAL **: pango_context_set_font_description: assertion `context != NULL' failed
(.:17319): Pango-CRITICAL **: pango_context_set_base_dir: assertion `context != NULL' failed
(.:17319): Pango-CRITICAL **: pango_context_set_language: assertion `context != NULL' failed
(.:17319): Pango-CRITICAL **: pango_layout_new: assertion `context != NULL' failed
(.:17319): Pango-CRITICAL **: pango_layout_set_text: assertion `layout != NULL' failed
(.:17319): Pango-CRITICAL **: pango_layout_set_attributes: assertion `layout != NULL' failed
(.:17319): Pango-CRITICAL **: pango_layout_set_alignment: assertion `layout != NULL' failed
(.:17319): Pango-CRITICAL **: pango_layout_set_ellipsize: assertion `PANGO_IS_LAYOUT (layout)' failed
(.:17319): Pango-CRITICAL **: pango_layout_set_single_paragraph_mode: assertion `PANGO_IS_LAYOUT (layout)' failed
(.:17319): Pango-CRITICAL **: pango_layout_set_width: assertion `layout != NULL' failed
(.:17319): Pango-CRITICAL **: pango_layout_get_extents: assertion `layout != NULL' failed
(.:17319): Gtk-CRITICAL **: gtk_icon_theme_get_for_screen: assertion `GDK_IS_SCREEN (screen)' failed
(.:17319): Gtk-CRITICAL **: gtk_settings_get_for_screen: assertion `GDK_IS_SCREEN (screen)' failed
(.:17319): Gtk-CRITICAL **: gtk_icon_size_lookup_for_settings: assertion `GTK_IS_SETTINGS (settings)' failed
(.:17319): Gtk-WARNING **: Invalid icon size 6
(.:17319): Gtk-CRITICAL **: gtk_icon_theme_load_icon: assertion `GTK_IS_ICON_THEME (icon_theme)' failed
Segmentation fault

我尝试了 ./ParseHeapDump.sh ../java_pid1491.hprof 并得到了以下错误，

Caused by: java.lang.NoClassDefFoundError: com/ibm/dtfj/image/CorruptDataException
        at org.eclipse.mat.dtfj.InitDTFJ.stop(InitDTFJ.java:70)

Answer 1

我昨天在 Linux 上使用 MAT....查看正确的版本 here