Tag Archives: Error logging

java.lang.IllegalStateException: Cannot call sendRedirect() after the response has been committed

Error message: java.lang.illegalstateexception: cannot call sendredirect() after the response has been committed java.lang.illegalstateexception

Error message parsing: redirection cannot be called after response

Basic overview of Servlet

    determine whether it is necessary to use redirection. If necessary, use redirection. Otherwise, continue the work of servlet

    Cause of error:

      when using retargeting, our page has jumped, and the retargeted code will not be able to perform work. In order to make the jump page unaffected, we add a return after retargeting (most likely) the doget() and dopost() methods in servlet are incomplete. For example, write a doget() method less and delete the super. Doget() and super. Dopost() in the doget() and dopost() methods after rewriting; Here, we can use a request method to receive parameters. For example, the client uses the post or get request to send parameters, and we receive and respond consistently using the get method. At this time, we can add the code dopost (request, response) in the dopost () method check whether the program logic causes multiple jumps

      Note: when we write the redirection path. Redirection supports both the project resources and the resources in the server to use redirection, so the general redirection path is /project resource name/page or servlet to be redirected to or write the relative path directly

Type error: sequence item 0: expected STR instance, int found

TypeError: sequence item 0: expected STR instance, int found TypeError: sequence item 0: expected STR instance, int found
List1 =[1,’two’,’three’,4]
print(‘ ‘.join(list1))
I thought it would print 1, two, three, four
The result was an error
Traceback (most recent call last):
File “< pyshell#27>” , line 1, in < module>
print(” “.join(list1))
peerror: sequence item 0: expected STR instance, int found
p> (“.join(list1))
TypeError: sequence item 0: expected STR instance, int found
A list of numbers cannot be converted directly to a string.
Print (” “.join(‘%s’ %id for id in list1))
That is, iterating through the elements of the list, converting them to strings. So I can print 1, 2, 3, 4.

Spring data JAP SQL error:17059 SQL State:99999

Error phenomenon: Startup times are wrong and cannot be converted to an internal representation, as shown in the figure below.

Reason: The error is that the Hibernate configuration file cannot be converted into information for the corresponding table in the database.
In general, Hibernate field attributes are wrongly written, String type is written as long, number type is written as String and so on, causing the database content cannot be converted to Java class.

Corresponding method: Check that the database table field and the entity class attribute types are the same

Error: pathspec ‘origin / xxx’ did not match any file (s) known to GIT

There is a test branch on the project. You can’t see the remote branch by using Git Branch-A. You can directly use the command Git Checkout Test to report the error as follows:

error: pathspec 'origin/test' did not match any file(s) known to git.

Solution:
1. Execute git fetch to fetch updates of all branches
2. You can see the Test branch when executing Git Branch-A (the branch information has been updated).
3. Switch git Checkout Test

ERROR: JDWP Unable to get JNI 1.2 environment

failed to get JNI 1.2 environment, JVM ->

ERROR: JDWP is Unable to get JNI 1.2 environment, JVM -> The GetEnv () return code = – 2

the JDWP exit error AGENT_ERROR_NO_JNI_ENV (183) : [… /… /…/SRC/share/back/util. C: 820]

to find the reason for the error. Found a problem with redirecting the output.

is the following is the original network data

install jdk1.6, ha ha ~ I also met this problem. This is something I found on the Internet before. I hope it will be helpful to you.

ERROR: JDWP incapable to get JNI 1.2 environment, JVM -> The GetEnv () return code = – 2

the JDWP exit error AGENT_ERROR_NO_JNI_ENV (183) : [… /… /…/SRC/share/back/util. C: 820]

this is going on?Now Java SE 6 has reached the stage of RC, huh?

after I looked up the Java Doc carefully, I found that there is such a paragraph: http://download.java.net/jdk6/docs/api/java/io/Console.html

“been a virtual machine from a console is dependent upon the physicist platform and also upon the manner in which the virtual machine is invoked. If the virtual machine is started from an interactive command line without redirecting the standard input and
output streams then its console will exist and will typically be connected to the keyboard and display from which the virtual machine was launched. If the virtual machine is started automatically, for example by a background job scheduler, Then it will typically

1, use the command line to run, compile can use the integrated development environment. This completes standard output. 2. Redirect stdout in the program to another device or mode (such as writing to a text file), which can also be “inconvenient” to complete the function. 3. At the end of main function, add system.exit(0);

note:

return and system.exit() what is the difference between:

1. Return is the upper level of the program, system. Exit () is the top level of the program

2