Liferay is not generating preview for PDF file only. It generates preview for all other types of files. I had linux server + liferay 6.2 GA3 + Imagemagick + Ghost + openoffice. I had running openoffice. Conversation from one file to other working fine, I have only problem for pdf file preview. Previously it was generating preview. The surprising thing is no log for PDF in machine but log for other files.
I am able to conver PDF to png whith help of convert command.
Below are logs while uploading PDF
tail -f /opt/trianz-portal/tomcat-7.0.42/logs/catalina.out 14:03:15,404 ERROR [ajp-bio-8009-exec-38][PollerServlet:63] No channel exists with user id 80601 14:03:15,428 ERROR [ajp-bio-8009-exec-38][status_jsp:752] No channel exists with user id 80601 14:03:18,868 ERROR [ajp-bio-8009-exec-40][PollerServlet:63] No channel exists with user id 80601 14:03:18,890 ERROR [ajp-bio-8009-exec-40][status_jsp:752] No channel exists with user id 80601 14:03:21,115 ERROR [ajp-bio-8009-exec-38][PollerServlet:63] No channel exists with user id 80601 14:03:21,138 ERROR [ajp-bio-8009-exec-38][status_jsp:752] No channel exists with user id 80601 14:03:34,851 ERROR [ajp-bio-8009-exec-33][PollerServlet:63] No channel exists with user id 50659 14:03:34,925 ERROR [ajp-bio-8009-exec-33][status_jsp:752] No channel exists with user id 50659 14:03:58,000 WARN [liferay/scheduler_dispatch-3][RestStorageService:221] Content-Length of data stream not set, will automatically determine data length in memory 14:04:36,238 WARN [ajp-bio-8009-exec-39][RestStorageService:221] Content-Length of data stream not set, will automatically determine data length in memory
Below logs for other files where preview genarate successfully for other files 14:07:19,844 WARN [ajp-bio-8009-exec-9][RestStorageService:221] Content-Length of data stream not set, will automatically determine data length in memory 14:07:21,668 INFO [liferay/document_library_pdf_processor-1][GhostscriptImpl:71] Excecuting command '/usr/local/bin/gs -dBATCH -dSAFER -dNOPAUSE -dNOPROMPT -sFONTPATH/usr/local/bin:/usr/bin:/usr/local/share/ghostscript/fonts -sDEVICE=png16m -sOutputFile=/opt/trianz-portal/tomcat-7.0.42/temp/liferay/document_preview/2662941.1.0-%d.png -dPDFFitPage -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r300 -dDEVICEWIDTH1000 /opt/trianz-portal/tomcat-7.0.42/temp/liferay/document_conversion/2662941.1.0.pdf ' 14:07:23,429 WARN [liferay/document_library_pdf_processor-1][RestStorageService:221] Content-Length of data stream not set, will automatically determine data length in memory 14:07:24,199 WARN [liferay/document_library_pdf_processor-1][RestStorageService:221] Content-Length of data stream not set, will automatically determine data length in memory 14:07:24,966 WARN [liferay/document_library_pdf_processor-1][RestStorageService:221] Content-Length of data stream not set, will automatically determine data length in memory 14:07:25,028 WARN [liferay/document_library_pdf_processor-1][RestStorageService:221] Content-Length of data stream not set, will automatically determine data length in memory 14:07:25,180 INFO [liferay/document_library_pdf_processor-1][PDFProcessorImpl:423] Ghostscript generated 4 preview pages for assign.doc in 3512 ms 14:07:25,194 INFO [liferay/document_library_pdf_processor-1][GhostscriptImpl:71] Excecuting command '/usr/local/bin/gs -dBATCH -dSAFER -dNOPAUSE -dNOPROMPT -sFONTPATH/usr/local/bin:/usr/bin:/usr/local/share/ghostscript/fonts -sDEVICE=png16m -sOutputFile=/opt/trianz-portal/tomcat-7.0.42/temp/liferay/document_thumbnail/2662941.1.0.png -dFirstPage=1 -dLastPage=1 -dPDFFitPage -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r300 -dDEVICEWIDTH1000 /opt/trianz-portal/tomcat-7.0.42/temp/liferay/document_conversion/2662941.1.0.pdf ' 14:07:26,360 WARN [liferay/document_library_pdf_processor-1][RestStorageService:221] Content-Length of data stream not set, will automatically determine data length in memory 14:07:26,392 INFO [liferay/document_library_pdf_processor-1][PDFProcessorImpl:438] Ghostscript generated a thumbnail for assign.doc in 1198 ms
