CODEWITHSUNDEEP
javaunix
Philipp Schneider
Philipp Schneider

Reputation: 356

Java File Creation Filecount limit

i want to ask if there is a limit for how many files can be in a directory?

I write files with

File outputFile = new File("xy.txt");
outputFile.createNewFile();

and i got following Exception:

java.io.IOException: Input/output error
    at java.base/java.io.UnixFileSystem.createFileExclusively(Native Method) ~[na:na]
    at java.base/java.io.File.createNewFile(File.java:1043) ~[na:na]
    ...

The folder contains more than 1.7 million files, after clearing the folder the exception disapears.

When i create files manually (ssh to the host) I have no problems creating files.

Upvotes: 0

Views: 120

Answers (1)

tquadrat
tquadrat

Reputation: 4034

The various operating systems and their flavours have all different limits for the number of files per folder/directory, and also for the number of files per file system and/or drive.

In addition, some operating systems or extensions to an operating system allow to impose a user quota for the number of files, again per directory/folder and/or per file system.

So the answer to your question is a clear yes.

For some operating systems/flavours, these numbers are configurable within some limitations (for file systems, usually a reformatting is necessary).

But as said, this is a limitation of the underlying OS, and nothing special for Java.

Upvotes: 1

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