Java. Lang. outofmemoryerror: Java heap Space========================================================== ==============
Use JavaProgramAn exception occurred when querying a large amount of data from the database:Java. Lang. outofmemoryerror: Java heap Space
This exception
Author: Xiaolou
Original Website:
Http://blog.vonno.com/33993/viewspace_1245
17:50:57/personal classification: Knowledge Summary
Cause:An exception occurs when a Java program is used to query a large amount of data from the database:Java. Lang. outofmemoryerror: Java heap SpaceThis exception is thrown if 98% is used for GC and the available heap size is less tha
SummaryAs an Enterprise Java developer, we always need to implement various functions, such as parsing XML, using HTTP, verifying input and processing dates. The objective of using the Jakarta Commons project is to create components responsible for processing all such common tasks, saving time and allowing you to focus on core business solutions. In this article, we will briefly introduce the Jakarta Commons project, and then demonstrate how to use th
Http://blog.csdn.net/jxzxm1_2/article/details/2499751
An exception occurs when a Java program is used to query a large amount of data from the database:Java. Lang. outofmemoryerror: Java heap SpaceThis exception is thrown if 98% is used for GC and the available heap size is less than 2% in JVM.JVM heap setting refers to the setting of memory space that JVM can a
Addnode. sh failed, log file error PRKC-1025 java. lang. OutOfMemoryError: Java heap space,Environment:
Linux 5.5 + RAC 11203
Problem description:
The command to add a cluster member is as follows:
$ GRID_HOME/oui/bin/addNode. sh-silent "CLUSTER_NEW_NODES = {X3850AR}" "CLUSTER_NEW_PRIVATE_NODE_NAMES = {X3850AR-priv}" "CLUSTER_NEW_VIRTUAL_HOSTNAMES = {X3850AR-vip
MyCAT reports java. lang. OutOfMemoryError: Java heap space
In the morning, my colleague reported that mycat was suspended again. It was estimated that the memory was still overflow and I checked the error log.
INFO | jvm 1 | 07:09:06 | java. lang. OutOfMemoryError:
Error querying database. Cause: java. lang. IllegalArgumentException: Mapped Statements collection does not contain value ..., Querying
After compiling and running the web successfully, you do not need to connect to the database on the accessed page. If you do not call the object class through reflection, no error is reported,The error message is as follows:
[WARNING]Org. springframework. web. util. NestedS
From: http://hi.baidu.com/dearfenix/blog/item/1b0ce80e64ca12ce7bcbe109.html
It has always been known that JVM heap size can be set, and Java programs are always written/debugged using eclipse. Run the program by adding parameters on the command line or console. Symptom: In the eclipse configuration file eclipse. set-vmargs-xms500m-xmx1024m in ini. Java still appears when you run or debug some memory-consu
source code. If classpath is not specified or an error is specified when you run the Java program, the virtual machine cannot find the correct path, and thus the java. Lang. noclassdeffounderror: exception in thread "Main" error occurs. Therefore, when such a similar problem occurs, you should first check whether the classpath has a problem.
In addition, when we
Java record-87-java. lang. reflect. ArrayThe java. lang. reflect. Array class provides various static methods for dynamically creating and accessing Array elements.
Import java. lang. r
Take the tomcat environment as an example. Other WEB servers, such as jboss and weblogic, share the same principle.1. java. lang. OutOfMemoryError: PermGen spacePermGen space stands for Permanent Generation space, which is the Permanent storage area of the memory,This memory is mainly used by JVM to store Class and Meta information. When the Class is loaded, it will be placed in PermGen space,Unlike the Hea
Java. Lang. outofmemoryerror: Java heap space and its processing
During development, JavaProgramAn exception occurred when querying a large amount of data from the database:Java. Lang. outofmemoryerror: Java heap Space
This exception is thrown if 98% is used for GC and t
The root cause of this problem is that the default heap size of the JVM virtual machine is 64 MB, which can be achieved by setting the maximum and minimum values. There are several ways to set the heap size.
1. You can add java_opts =-xms64m-xmx512m to change the system environment variable in windows.
2. If Tomcat is used, in windows, add: e: \ Program Files \ apache-Tomcat-6.0.29 \ bin \ Catalina. BAT:
Set java_opts =-xms512m-xmx512m
The location is added to the row REM guess catali
When I started my computer at work in the morning, I found a problem with the application startup. The prompt was: Java. Lang. noclassdeffounderror: javax/transaction/transactionmanager. So I googled it and it turned out to be missing JTA. jar. It's strange that it was good. Why is it missing today? Is there a problem with eclipse.
JTA. jar:
1, http://java.sun.com/products/jta/ download class files, and th
Java. lang. OutOfMemoryError
Cause:The following are common examples:
1. The amount of data loaded in the memory is too large, such as extracting too much data from the database at a time;
2. There are references to objects in the Collection class, which are not cleared after use, so that JVM cannot be recycled;
3. There are endless loops or loops in the code that generate too many repeated object entities
From: http://hi.baidu.com/cjxgotofly/blog/item/ef981434e2e112355ab5f55f.html
Java. Lang. outofmemoryerrorTroubleshooting
Cause:The following are common examples:
1. The amount of data loaded in the memory is too large, such as extracting too much data from the database at a time;
2. There are references to objects in the Collection class, which are not cleared after use, so that JVM cannot be
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.