bash - my server-side shows nullPointerException when client-side runs java -


this question has answer here:

i have server linux mint os has server-side maven project reads environmental variables.

the environmental variables declared in /etc/profile.d/my_env_vars.sh with:

export my_var=/opt/my_app  export path=$my_var:$path

my server side has function when run eclipse (installed in server) works fine no errors.

public file convert( byte [] image) throws ioexception {     string filepath = system.getenv("my_var");     file imagefile = file.createtempfile("temp", "tmp", new file(filepath));  ...     return imagenfile; }

my client-side maven project. sends byte[] image function above , server gives result, got nullpointerexception error:

java.lang.nullpointerexception java.io.file.<init>(file.java:277) second line of function file imagefile = file.createtempfile("temp","temp...

immediately in server terminal verified environmental variable echo $my_var , gives me correct value (/opt/my_app)

why function work correctly in server-side gives nullpointerexception error in client-side?

i have tried declaring environmental variables in other files ~/.bashrc ~/.profile /etc/bash.bashrc , nothing works. read in other post try edit ~/.bash_profile linux mint doesn't have file.

i appreciate advice.

on client, nullpointerexception thrown because environment variable not set correctly , null passed constructor of file.

put my_var in ~/.profile , notice file loaded once when login. therefore, after setting new environment variable, make sure log out , in. if file doesn't exist, create it.

you can test it's set using:

$ env | grep my_var my_var=value

Comments

Post a Comment

Popular posts from this blog

python - Operations inside variables -

this question has answer here: evaluating mathematical expression in string 12 answers i want make python script finds maximum possible output using 2 operations. problem says there syntax error @ 2nd last line, in b in there. how can fix it? x = 0 = int(input("1st number:")) c = int(input("2nd number:" )) e = int(input("3rd number:" )) in range(4): if == 0: b = "+" elif == 1: b = "-" elif == 2: b = "/" else: b = "*" j in range(4): if j == 0: d = "+" elif j == 1: d = "-" elif j == 2: d = "/" else: d = "*" k = b c d e print(k) if you're after variables e on single line, couldn...
Read more

Generic Map Parameter java -

i having lot of methods of type: public static list<eduusers> getdetails(class c, map<string, integer> params) { list<eduusers> details = null; session session = hibernateutil.getsessionfactory().opensession(); transaction tx = null; try { tx = session.begintransaction(); criteria cr = session.createcriteria(c); (map.entry<string, integer> entry : params.entryset()) { cr.add(restrictions.eq(entry.getkey(), entry.getvalue())); } details = cr.list(); tx.commit(); } catch (exception asd) { log.debug(asd.getmessage()); if (tx != null) { tx.commit(); } } { session.close(); } return details; } i trying have generic method them , have written far: public static <t> list<t> getdetails(class<t> c, class<t> b) { l...
Read more

arrays - What causes a java.lang.ArrayIndexOutOfBoundsException and how do I prevent it? -

what arrayindexoutofboundsexception mean , how rid of it? here code sample triggers exception: string[] name = {"tom", "dick", "harry"}; for(int = 0; i<=name.length; i++) { system.out.print(name[i] +'\n'); } your first port of call should documentation explains reasonably clearly: thrown indicate array has been accessed illegal index. index either negative or greater or equal size of array. so example: int[] array = new int[5]; int boom = array[10]; // throws exception as how avoid it... um, don't that. careful array indexes. one problem people run thinking arrays 1-indexed, e.g. int[] array = new int[5]; // ... populate array here ... (int index = 1; index <= array.length; index++) { system.out.println(array[index]); } that miss out first element (index 0) , throw exception when index 5. valid indexes here 0-4 inclusive. correct, idiomatic for statement here be: for (int index = 0; index <...
Read more