Java heap space issue-OutOfMemoryError, issue The memory is accumulated in one instance of "char[]" loaded by "<system class loader>".

[mundrameenaxi]

We recently faced OutOfMemoryError-java heap space issue and had to restart the server. When looking at log we found the attached error

 I assume the error was due to report couldn't be printed on preview section as it didnot find enough memory on system

Need expert advise. please help. 

We checked the hprof file and could lead to the issue as below

One instance of "org.apache.jasper.runtime.BodyContentImpl" loaded by "java.net.URLClassLoader @ 0x734cd9588" occupies 570,425,408 (33.03%) bytes. The memory is accumulated in one instance of "char[]" loaded by "<system class loader>".