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Memory leak using Stringbuilder in java


Memory leak using Stringbuilder in java

By : Aldrin B.
Date : November 23 2020, 03:01 PM
will help you The best way is to enable verbose GC logs, and then track the timings at which full GC is triggered which basically covers the GC for young, survivor and tenured generation (your string builder object might be held up in any of these areas).
So still after the full GC, if you see that the memory is not freed up, then the best tool will be to use eclipse MAT and track which objects are occupying memory.
code :


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SAX, StringBuilder and memory leak

SAX, StringBuilder and memory leak


By : Maneesh
Date : March 29 2020, 07:55 AM
will help you I think it might be to do with a performance optimisation of the StringBuffer toString() method.
The Sun javadoc says the following:
code :
currentStory.setLength(0);
currentStory = new StringBuffer();
Possible memory leak with StringBuilder?

Possible memory leak with StringBuilder?


By : Vikas Gage
Date : March 29 2020, 07:55 AM
I hope this helps . There is no memory leak. The instance of File created for the first time, will be garbage-collected by JVM when it is no longer used.
The other thing is that you don't really need to use StringBuilder. File class has a constructor that takes a parent and a filename. Your example could look like this:
code :
File parent = new File("/home/logs/");
if(!parent.exists())
    parent.mkdir();

File file = new File(parent, "MyLogFile.log");
// TODO: do something with file...
looping StringBuilder memory leak

looping StringBuilder memory leak


By : Scott_A
Date : March 29 2020, 07:55 AM
I wish did fix the issue. For a project in my data structures class, we have to traverse a graph using both breadth first and depth first traversals. Depth first traversals, in this case, are commonly between 1 and 100,000 nodes long. , You don't need to use StringBuilder in your example. Instead just do:
code :
System.out.println(dfs.pop());
public class TestMain {
  public static void main(String[] args) {
    long timeBefore = System.currentTimeMillis();
    for (int i = 0; i < 50000; i++) {
        System.out.println("Value = " + i);
    }
    long timeAfter = System.currentTimeMillis();
    System.out.println("Time elapsed (ms): " + (timeAfter - timeBefore));
  }
}
. . .
Value = 49994
Value = 49995
Value = 49996
Value = 49997
Value = 49998
Value = 49999
Time elapsed (ms): 538
public static void main(String[] args) {
    long timeBefore1 = System.currentTimeMillis();
    Stack<String> s = new Stack<String>();
    for (int i = 0; i < 50000; i++) {
        s.push("Value = " + i);
    }
    long timeAfter1 = System.currentTimeMillis();
    long timeBefore2 = System.currentTimeMillis();
    while (!s.isEmpty()) {
        System.out.println(s.pop());
    }
    long timeAfter2 = System.currentTimeMillis();
    System.out.println("Time spent on building stack (ms): " + (timeAfter1 - timeBefore1));
    System.out.println("Time spent on reading stack (ms): " + (timeAfter2 - timeBefore2));
}
. . .
Value = 2
Value = 1
Value = 0
Time spent on building stack (ms): 31
Time spent on reading stack (ms): 551
Potential memory leak in Java, may this code lead to the memory leak?

Potential memory leak in Java, may this code lead to the memory leak?


By : Ye Ting
Date : March 29 2020, 07:55 AM
it should still fix some issue There will be no leaks in your code as long as the drv object does not maintain references to objArr. The reference objArr to your "heavy object" is limited to the scope of the while loop, and thus once you leave an iteration, it is eligible for garbage collection. However, if drv maintains a permanent reference to the object, then it will not be collected as long as the reference persists.
The example in the link you mention is when the reference to your data lives outside the scope (in their example, the E[] array field of the Stack class) and cannot be collected.
Memory Leak in StringBuilder when using Insert() and Clear()

Memory Leak in StringBuilder when using Insert() and Clear()


By : Rakesh T Sasi
Date : March 29 2020, 07:55 AM
Hope this helps I need to add some lines to a StringBuilder, where the line added last should be at the beginning of the string and the oldest at the end. I add a new line like this: , I would say that the behaviour is to be expected:
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