But I am just speculating, here. Well, if you can explain it, then as I said: It's probably not malware. I didn't mean to shake you up like that. You can go ahead and delete them. Thanks for checking with us first! An official flavour of the Ubuntu family. Ubuntu is a trademark of Canonical Ltd. I look forward to hearing more about this issue. Thanks Not an expert, but I'll dig out further. If another reason, then why the log is referring to PDFStudio multiples times? Got Firefox and LibreOffice that had to close and re-start but only once since May.
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Related Hot Network Questions. In the event that the file cannot be created in the working directory insufficient space, permission problem, or other issue , the file is created in the temporary directory for the operating system. On Windows the temporary directory is specified by the value of the TMP environment variable; if that environment variable is not defined, the value of the TEMP environment variable is used.
The error log contains information obtained at the time of the fatal error, including the following information, where possible. Note - In some cases only a subset of this information is output to the error log.
This can happen when a fatal error is of such severity that the error handler is unable to recover and report all details. A header that provides a brief description of the crash. See C. A section with thread information. A section with process information. A section with system information. Note - Note that the format of the fatal error log described here is based on JDK 7. The format might be different with other releases. The header section at the beginning of every fatal error log file contains a brief description of the problem.
The header is also printed to standard output and may show up in the application's output log. This example shows that the VM crashed on an unexpected signal.
The next line describes the signal type, program counter pc that caused the signal, process ID and thread ID, as follows.
The next line contains the VM version Client VM or Server VM , an indication whether the application was run in mixed or interpreted mode, and an indication whether class file sharing was enabled. The following table shows the possible frame types. Internal errors will cause the VM error handler to generate a similar error dump.
However, the header format is different. Examples of internal errors are guarantee failure, assertion failure, ShouldNotReachHere , and so forth.
Here is an example of how the header looks for an internal error. In the above header, there is no signal name or signal number. This hexadecimal string encodes the source module and line number where the error was detected.
The error string encodes a line number and therefore it changes with each code change and release. A crash with a given error string in one release for example 1.
Note - Do not assume that a workaround or solution that worked in one situation associated with a given error string will work in another situation associated with that same error string.
Note the following facts:. This section contains information about the thread that just crashed. If multiple threads crash at the same time, only one thread is printed. The thread pointer is the pointer to the Java VM internal thread structure. It is generally of no interest unless you are debugging a live Java VM or core file. If a Java thread is a daemon thread, then the string daemon is printed before the thread state.
The next information in the error log describes the unexpected signal that caused the VM to terminate. On a Windows system the output appears as follows. The next information in the error log shows the register context at the time of the fatal error. The exact format of this output is processor-dependent.
The following example shows output for the Intel IA32 processor. After the register values, the error log contains the top of stack followed by 32 bytes of instructions opcodes near the program counter PC when the system crashed. These opcodes can be decoded with a disassembler to produce the instructions around the location of the crash.
Note that IA32 and AMD64 instructions are variable in length, and so it is not always possible to reliably decode instructions before the crash PC. Where possible, the next output in the error log is the thread stack.
This includes the addresses of the base and the top of the stack, the current stack pointer, and the amount of unused stack available to the thread. This is followed, where possible, by the stack frames, and up to frames are printed.
It is important to note that in some fatal error conditions the stack may be corrupt, and in this case this detail may not be available. The first thread stack is Native frames , which prints the native thread showing all function calls.
However this thread stack does not take into account the Java methods that are inlined by the runtime compiler; if methods are inlined they appear to be part of the parent's stack frame.
The information in the thread stack for native frames provides important information about the cause of the crash. By analyzing the libraries in the list from the top down, you can generally determine which library might have caused the problem and report it to the appropriate organization responsible for that library.
The second thread stack is Java frames , which prints the Java frames including the inlined methods, skipping the native frames.
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